It is estimated that by 1942 Einsatzgruppen had killed more than 1 million Soviet troops. These victims were either shot or gassed. Jews were not the only ones killed. People who opposed Hitler were also murdered. 20th century techniques of mass production were applied in the Final Solution. Engineers of the Final Solution used these ways to cheaply and efficiently murder millions of Jews there were many ways the Nazis murdered people. Some ways were crematoriums, electrocution, injections, flame throwers, hand grenades, and gas chambers. Units of the S.S. that were specially trained followed German troops called the first wave. These squads made up the Einsatzgruppen. Nazis genocide was targeted towards Jews mass murder was targeted towards other Non-Aryans.      
Mengele became interested in using twins for medical research through his mentor, Verschuer. Verschuer himself was famous for experimenting with identical and fraternal twins in order to trace the genetic origins of various diseases. During the 1930s, twin research was seen as an ideal tool in weighing the factors of human heredity and environment. Mengele and his mentor had performed a number of legitimate research protocols using twins as test subjects throughout the 1930s. Now, at Auschwitz, with full license to maim or kill his subjects, Mengele performed a broad range of agonizing and often lethal experiments with Jewish and Roma (Gypsy) twins, most of them children.
The word “Holocaust,” from the Greek words “holos” (whole) and “kaustos” (burned), was historically used to describe a sacrificial offering burned on an altar. Since 1945, the word has taken on a new and horrible meaning: the mass murder of some 6 million European Jews (as well as millions of others, including Gypsies and homosexuals) by the German Nazi regime during the Second World War. To the anti-Semitic Nazi leader Adolf Hitler, Jews were an inferior race, an alien threat to German racial purity and community. After years of Nazi rule in Germany, during which Jews were consistently persecuted, Hitler’s “final solution”–now known as the Holocaust–came to fruition under the cover of world war, with mass killing centers constructed in the concentration camps of occupied Poland.
On Friday, August 4, 1944, the day of the arrest, Miep Gies climbed the stairs to the hiding place and found it ransacked and wrecked. The beleaguered little band had been betrayed by an informer who was paid seven and a half guilders—about a dollar—for each person: sixty guilders for the lot. Miep Gies picked up what she recognized as Anne’s papers and put them away, unread, in her desk drawer. There the diary lay untouched, until Otto Frank emerged alive from Auschwitz. “Had I read it,” she said afterward, “I would have had to burn the diary because it would have been too dangerous for people about whom Anne had written.” It was Miep Gies—the uncommon heroine of this story, a woman profoundly good, a failed savior—who succeeded in rescuing an irreplaceable masterwork. It may be shocking to think this (I am shocked as I think it), but one can imagine a still more salvational outcome: Anne Frank’s diary burned, vanished, lost—saved from a world that made of it all things, some of them true, while floating lightly over the heavier truth of named and inhabited evil. ♦
Same edition as the one I have read from my local library. This appears to be as fine an edition as you can get, and I have done a fair amount of research on that. This, the "definitive edition" has a lot of material that did not appear in the original one that was edited by Anne's father after the war. It also is on superior paper, with very readable type, and the photos are clearly rendered, compared to the other editions I have had in hand.

“I’ve offered three possibilities” to the museum, Freund said. The first was to try to partially excavate one section of the tunnel and protect it with climate-controlling plexiglass walls. Alternatively, a re-creation could be built, as had been done with the recently finished facsimile of King Tutankhamun’s tomb, in the Valley of the Kings, in Egypt. The last option, Freund allowed, was a “little futuristic”: Relying on the data from the scans, a 3-D film could be created so visitors could relive the experience of the escape.

As Siksnianas led Freund through the woods, he told an astonishing story about a group of prisoners who had reportedly tunneled to freedom and joined partisan fighters hiding out in the forest. But when Freund asked to see exactly how they made it out, he got only shrugs. No one could show him; no one knew. Because a tunnel had never been definitively located and documented, the story had come to take on the contours of a fable, and three-quarters of a century on, it seemed destined to remain a legend without any verifiable evidence to back it up—a crucial piece of the historical record, lost to time.

The Roma refer to the genocide of the Romani people as the Pořajmos.[414] Because they are traditionally a private people with a culture based on oral history, less is known about their experience than that of any other group.[415] Bauer writes that this can be attributed to the Roma's distrust and suspicion, and to their humiliation because some of the taboos in Romani culture regarding hygiene and sex were violated at Auschwitz.[416] In May 1942, the Roma were placed under similar laws to the Jews. On 16 December 1942, Himmler issued a decree that "Gypsy Mischlinge [mixed breeds], Roma Gypsies, and members of the clans of Balkan origins who are not of German blood" should be sent to Auschwitz, unless they had served in the Wehrmacht.[417] He adjusted the order on 15 November 1943; in the occupied Soviet areas, "sedentary Gypsies and part-Gypsies are to be treated as citizens of the country. Nomadic Gypsies and part-Gypsies are to be placed on the same level as Jews and placed in concentration camps."[418] Bauer argues that this adjustment reflected Nazi ideology that the Roma, originally an Aryan population, had been "spoiled" by non-Romani blood.[419]

Historians are divided about the motivations of the members of these mobile killing units. American historian Christopher Browning described one such unit, Police Battalion 101, as ordinary men in extraordinary circumstances in which conformity, peer pressure, careerism, obedience to orders, and group solidarity gradually overcame moral inhibitions. American writer Daniel Goldhagen viewed the very same unit as “willing executioners,” sharing Hitler’s vision of genocidal anti-Semitism and finding their tasks unpleasant but necessary. The diversity of the killers has challenged Goldhagen’s view that the motivation was a distinct form of German anti-Semitism. Yet both Browning and Goldhagen concurred that none of these killers faced punishment if he asked to be excused. Individuals had a choice whether to participate or not. Almost all chose to become killers.

Otto Frank, it turns out, is complicit in this shallowly upbeat view. Again and again, in every conceivable context, he had it as his aim to emphasize “Anne’s idealism,” “Anne’s spirit,” almost never calling attention to how and why that idealism and spirit were smothered, and unfailingly generalizing the sources of hatred. If the child is father of the man—if childhood shapes future sensibility—then Otto Frank, despite his sufferings in Auschwitz, may have had less in common with his own daughter than he was ready to recognize. As the diary gained publication in country after country, its renown accelerating year by year, he spoke not merely about but for its author—and who, after all, would have a greater right? The surviving father stood in for the dead child, believing that his words would honestly represent hers. He was scarcely entitled to such certainty: fatherhood does not confer surrogacy.
In the manuscript, her original diaries are written over three extant volumes. The first volume (the red-and-white checkered autograph book) covers the period between June 14 and December 5, 1942. Since the second surviving volume (a school exercise book) begins on December 22, 1943, and ends on April 17, 1944, it is assumed that the original volume or volumes between December 1942 and December 1943 were lost - presumably after the arrest, when the hiding place was emptied on Nazi instructions. However, this missing period is covered in the version Anne rewrote for preservation. The third existing volume (which was also a school exercise book) contains entries from April 17 to August 1, 1944, when Anne wrote for the last time before her arrest.[16]:2

One extraordinary aspect of the journey to the death camps was that the Nazis often charged Jews deported from Western Europe train fare as third class passengers under the guise that they were being "resettled in the East." The SS also made new arrivals in the death camps sign picture postcards showing the fictional location "Waldsee" which were sent to relatives back home with the printed greeting: "We are doing very well here. We have work and we are well treated. We await your arrival."
With the invasion of the Soviet Union on June 22 1941, the Nazis launched a crusade against 'Judaeo-Bolshevism', the supposed Jewish-Communist conspiracy. Behind the front lines, four police battalions called Einsatzgruppen (operations groups) moved from town to town in the newly occupied Soviet territories, rounding up Jewish men and suspected Soviet collaborators and shooting them. In subsequent sweeps, making heavy use of local volunteers, the Einsatzgruppen targeted Jewish women and children as well. In total, the Einsaztgruppen murdered some two million people, almost all Jews.
It happened. That thing, the reason I have put off reading this, happened. My heart broke. And I knew it would. Sure, I had heard of Anne Frank, I knew who she was, what she did, what happened. She is a historic figure, and a tragic one certainly. But I didn't make the really personal connection until I read her words, this diary. Her words bring her to life again. What a precocious young girl, so smart, so full of life; a life with so much promise, so much hope. She thinks, even writes, very mu ...more

Perhaps not even a father is justified in thinking he can distill the “ideas” of this alert and sorrowing child, with scenes such as these inscribed in her psyche, and with the desolations of Auschwitz and Bergen-Belsen still ahead. His preference was to accentuate what he called Anne’s “optimistical view on life.” Yet the diary’s most celebrated line (infamously celebrated, one might add)—“I still believe, in spite of everything, that people are truly good at heart”—has been torn out of its bed of thorns. Two sentences later (and three weeks before she was seized and shipped to Westerbork), the diarist sets down a vision of darkness:
It is the shamelessness of appropriation. Who owns Anne Frank? The children of the world, say the sentimentalists. A case in point is the astonishing correspondence, published in 1995 under the title “Love, Otto,” between Cara Wilson, a Californian born in 1944, and Otto Frank, the father of Anne Frank. Wilson, then twelve-year-old Cara Weiss, was invited by Twentieth Century Fox to audition for the part of Anne in a projected film version of the diary. “I didn’t get the part,” the middle-aged Wilson writes, “but by now I had found a whole new world. Anne Frank’s diary, which I read and reread, spoke to me and my dilemmas, my anxieties, my secret passions. She felt the way I did. . . .I identified so strongly with this eloquent girl of my own age, that I now think I sort of became her in my own mind.” And on what similarities does Wilson rest her acute sense of identification with a hunted child in hiding?

Born on March 16, 1911 in Günzburg, Germany to a prosperous family, Josef Mengele was the eldest of 3 children. In 1935, he earned a PhD in physical anthropology from the University of Munich, and 2 years later he became the assistant of Dr. Otmar von Verschuer, a leading scientific figure known for his research with twins, at the Institute for Hereditary Biology and Racial Hygiene in Frankfurt. That same year, Mengele joined the Nazi Party, and in 1938, joined the SS. In 1940, he was drafted into the military, where he volunteered for medical service in the Waffen-SS. However, his time in the military was cut short after being wounded while on campaign and he was sent back to Germany, where he resumed work with von Verschuer at the Kaiser Wilhelm Institute for Anthropology.
^ Kwiet, Konrad (1998). "Rehearsing for Murder: The Beginning of the Final Solution in Lithuania in June 1941". Holocaust and Genocide Studies. 12 (1): 3–26. doi:10.1093/hgs/12.1.3. and Kwiet, Konrad (4 December 1995). The Onset of the Holocaust: The Massacres of Jews in Lithuania in June 1941. J. B. and Maurice Shapiro Senior Scholar-in-Residence at the United States Holocaust Memorial Museum (Annual lecture). Published under the same title, but expanded in Bonnell, Andrew, ed. (1996). Power, Conscience and Opposition: Essays in German History in Honour of John A Moses. New York: Peter Lang. pp. 107–21.
In June 1941, Mengele was posted to Ukraine, where he was awarded the Iron Cross 2nd Class. In January 1942, he joined the 5th SS Panzer Division Wiking as a battalion medical officer. After rescuing two German soldiers from a burning tank, he was decorated with the Iron Cross 1st Class, the Wound Badge in Black, and the Medal for the Care of the German People. He was declared unfit for further active service in mid-1942, when he was seriously wounded in action near Rostov-on-Don. Following his recovery, he was transferred to the headquarters of the SS Race and Settlement Main Office in Berlin, at which point he resumed his association with von Verschuer, who was now director of the Kaiser Wilhelm Institute of Anthropology, Human Heredity, and Eugenics. Mengele was promoted to the rank of SS-Hauptsturmführer (captain) in April 1943.[20][21][22]