After the September 1939 German invasion of Poland (the beginning of World War II), anti-Jewish policy escalated to the imprisonment and eventual murder of European Jewry. The Nazis first established ghettos (enclosed areas designed to isolate and control the Jews) in the Generalgouvernement (a territory in central and eastern Poland overseen by a German civilian government) and the Warthegau (an area of western Poland annexed to Germany). Polish and western European Jews were deported to these ghettos where they lived in overcrowded and unsanitary conditions with inadequate food.
From the earliest years of the Nazi regime, German authorities persecuted homosexuals and others whose behavior did not match prescribed social norms. German police officials targeted thousands of political opponents (including Communists, Socialists, and trade unionists) and religious dissidents (such as Jehovah's Witnesses). Many of these individuals died as a result of incarceration and maltreatment.
After the war, Dr. Josef Mengele worked on a farm under an assumed name for a few years, then escaped to South America; he was never put on trial as a war criminal. If he had been captured and put on trial, Dr. Gisella Perl was prepared to testify against him. Dr. Perl worked as a prison doctor under Dr. Mengele, and was a prisoner herself. According to the book "Mengele, the Complete Story," Dr. Perl claimed that a woman prisoner named Ibi had escaped the gas chamber six times by jumping off the truck that was taking the prisoners from the Judenrampe to the gas chambers; Dr. Mengele was enraged when he discovered that she had returned to the selection line.
Additional barriers stemmed from antisemitism, which was rampant in the cultural climate of Eastern Europe. Gentile rescuers thus often feared censure from their fellow citizens. Moreover, significant numbers of gentiles had to confront their own personal, sometimes unconscious, anti-Jewish feelings. Indeed, postwar interviews with rescuers have shown that although they tended to describe the Jews they saved as fine people, many characterized Jews in general as dirty, loud, greedy, aggressive, dishonest, deceitful, or underhanded.

The men worked in shifts throughout the night, with saws, files and spoons stolen from the burial pits. Under the cover of darkness, they smuggled wood planks into the lengthening tunnel to serve as struts; as they dug, they brought sandy earth back out and spread it across the bunker floor. Any noise was concealed by the singing of the other prisoners, who were frequently forced to perform for the Sturmbannführer—arias from The Gypsy Baron, by the Austrian composer Johann Strauss II, were a favorite.
The Nazis used the phrase Lebensunwertes Leben (life unworthy of life) in reference to the disabled and mentally ill.[92] On 14 July 1933, the Law for the Prevention of Hereditarily Diseased Offspring (Gesetz zur Verhütung erbkranken Nachwuchses), the Sterilization Law, was passed, allowing for compulsory sterilization.[93][94] The New York Times reported on 21 December that year: "400,000 Germans to be sterilized".[95] There were 84,525 applications from doctors in the first year. The courts reached a decision in 64,499 of those cases; 56,244 were in favor of sterilization.[96] Estimates for the number of involuntary sterilizations during the whole of the Third Reich range from 300,000 to 400,000.[97]
Though the Nazis tried to keep operation of camps secret, the scale of the killing made this virtually impossible. Eyewitnesses brought reports of Nazi atrocities in Poland to the Allied governments, who were harshly criticized after the war for their failure to respond, or to publicize news of the mass slaughter. This lack of action was likely mostly due to the Allied focus on winning the war at hand, but was also a result of the general incomprehension with which news of the Holocaust was met and the denial and disbelief that such atrocities could be occurring on such a scale.

The main event of the upcoming holiday of Purim is the reading of the Megillah, which tells the story of how brave Esther and pious Mordecai saved Persian Jewry from the genocidal schemes of the wicked Haman. In the Ashkenazi tradition, the public reading of the scroll is followed by reciting a poem whose unknown author lived no later than the 11th century. The concluding lines are usually sung to an up-beat tune:

After 1942, the economic functions of the camps, previously secondary to their penal and terror functions, came to the fore. Forced labor of camp prisoners became commonplace.[182] The guards became much more brutal, and the death rate increased as the guards not only beat and starved prisoners, but killed them more frequently.[186] Vernichtung durch Arbeit ("extermination through labor") was a policy—camp inmates would literally be worked to death, or to physical exhaustion, at which point they would be gassed or shot.[187] The Germans estimated the average prisoner's lifespan in a concentration camp at three months, due to lack of food and clothing, constant epidemics, and frequent punishments for the most minor transgressions.[188] The shifts were long and often involved exposure to dangerous materials.[189]

The Mossad’s South American station chief cabled the headquarters in Israel: “Zvi saw on Gerhard’s farm a person who in form, height, age and dress looks like Mengele.” It later turned out that he was indeed Mengele. Speaking to me in 1999, Aharoni told me: “We were in an excellent mood. I was certain that in a little while we would be able to bring Mengele to Israel to be tried.”
Four weeks after the invasion of the Soviet Union, on July 17, 1941, Hitler tasked SS chief Heinrich Himmler with responsibility for all security matters in the occupied Soviet Union. Hitler gave Himmler broad authority to physically eliminate any perceived threats to permanent German rule. Two weeks later, on July 31, Reich Marshall Hermann Göring, acting as Hitler's second-in-command, authorized Reinhard Heydrich, the chief of the Reich Main Office for Security (Reichssicherheitshauptamt; RSHA) and Himmler's direct subordinate, to make preparations for the implementation of a "complete solution of the Jewish question." Henceforth, the SS in general and the RSHA in particular enjoyed Hitler's decision-making authority to manage the implementation of the "Final Solution." [The RSHA consisted of the Security Police (Gestapo and Criminal Police) and the Security Service (Sicherheitsdienst-SD)]
One day this past fall I walked the grounds of the Ponar forest with Freund­ and a couple of his colleagues, who had recently completed a surveying project of the area. Snow had been forecast, but by late morning the only precipitation was icy rain, driven sideways by the wind. The forest was mostly empty, save for a group of ten Israelis who had arrived that morning; they all had family from Vilnius, one of the men explained, and were honoring them by visiting local Holocaust sites.
There were setbacks. In March, the diggers discovered they were tunneling in the direction of a burial pit and were forced to reroute the passageway, losing days in the process. Not long afterward, Dogim was on burial pit duty when he unearthed the bodies of his wife, mother and two sisters. Every member of the Burning Brigade lived with the knowledge that some of the corpses he was helping to burn belonged to family members. And yet to see one’s wife lying in the pit was something else entirely, and Dogim was consumed with sadness and fury. “[He] said he had a knife, that he was going to stab and kill the Sturmbannführer,” Farber later recalled. Farber told Dogim that he was thinking selfishly—even if he succeeded, the rest of the prisoners would be killed in retribution.

This is not about people acting out a crime of passion. This is planned and rationalized violence — a cultural brainwashing. The rationalization is always that the victims are not truly human, not worthy of the same protections of the law. It’s interesting that the Nazis are often linked to Christianity, especially the Catholic Church. But it is precisely the teachings of the Church that stand in the way of such dehumanization. This is something that Mengele himself knew, as he was raised in a Catholic family. In fact, in his post-WWII journal, Mengele specifically wrote, “We had to liberate Germanic history from Roman and Catholic influences.”
Mengele's research subjects were better fed and housed than the other prisoners, and temporarily spared from execution in the gas chambers.[42] He established a kindergarten for children who were the subjects of his experiments, as well as the preschool children from the Romani camp. The facility provided better food and living conditions than other areas of the camp, and included a children's playground.[43] When visiting his young subjects, he introduced himself as "Uncle Mengele" and offered them sweets,[44] while at the same time being personally responsible for the deaths of an unknown number of victims whom he killed via lethal injection, shootings, beatings, and his deadly experiments.[45] In his 1986 book, Lifton describes Mengele as sadistic, lacking empathy, and extremely antisemitic, believing the Jews should be eliminated entirely as an inferior and dangerous race.[46] Rolf Mengele later claimed that his father had shown no remorse for his wartime activities.[47]