Deportation was the first step in the “Final Solution.” Typically, the Jews were informed that they were going to be resettled for work. Each was told to take some clothing, blankets, shoes, eating utensils (but no knife), a bowl, and some money. Rounded up, they were herded into trucks for the trip to the rail station, or were forced to walk. The rail cars were often strategically located at a distance from the passenger terminals, so that this scene would not arouse the ire of the local populace. Many who did see chose not to protest.
The second is the saris, usually translated as “eunuch,” whose despair comes from childlessness. To him the prophet promises “a place and a name,” in Hebrew yad va-shem—a phrase, sometimes rendered “everlasting memorial,” that gives its name to Israel’s Holocaust memorial museum. Don’t worry, Isaiah is saying, you may think that your lack of progeny means that your name won’t live on. But God promises it will live on forever.
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.      
The biblical term shoah (Hebrew: שׁוֹאָה), meaning "destruction", became the standard Hebrew term for the murder of the European Jews, first used in a pamphlet in 1940, Sho'at Yehudei Polin ("Sho'ah of Polish Jews"), published by the United Aid Committee for the Jews in Poland.[11] On 3 October 1941 the cover of the magazine The American Hebrew used the phrase "before the Holocaust", apparently to refer to the situation in France,[12] and in May 1943 The New York Times, discussing the Bermuda Conference, referred to the "hundreds of thousands of European Jews still surviving the Nazi Holocaust".[13] In 1968 the Library of Congress created a new category, "Holocaust, Jewish (1939–1945)".[14] The term was popularized in the United States by the NBC mini-series Holocaust (1978), about a fictional family of German Jews,[15] and in November 1978 the President's Commission on the Holocaust was established.[16] As non-Jewish groups began to include themselves as Holocaust victims too, many Jews chose to use the terms Shoah or Churban instead.[12][g] The Nazis used the phrase "Final Solution to the Jewish Question" (German: die Endlösung der Judenfrage).[18]
Historians differ on the date of the decision to murder Jews systematically, the so-called “final solution to the Jewish question.” There is debate about whether there was one central decision or a series of regional decisions in response to local conditions. In either case, when Germany attacked the Soviet Union, its former ally, in June of 1941, the Nazis began the systematic killing of Jews.
After invading Poland, the Germans established ghettos in the incorporated territories and General Government to confine Jews.[143] The ghettos were formed and closed off from the outside world at different times and for different reasons.[196][197] For example, the Łódź ghetto was closed in April 1940,[143] to force the Jews inside to give up money and valuables;[198] the Warsaw ghetto was closed for health considerations (for the people outside, not inside, the ghetto),[199] but this did not happen until November 1940;[143] and the Kraków ghetto was not established until March 1941.[200] The Warsaw Ghetto contained 380,000 people[143] and was the largest ghetto in Poland; the Łódź Ghetto was the second largest,[201] holding between 160,000[202] to 223,000.[203] Because of the long drawn-out process of establishing ghettos, it is unlikely that they were originally considered part of a systematic attempt to eliminate Jews completely.[204]
In October 1941, Himmler authorized SS General Odilo Globocnik (SS and police leader for the Lublin District of the Generalgouvernement) to implement a plan to systematically murder all Jews residing in the Generalgouvernement. In 1942, this project received the code name "Operation Reinhard" (Einsatz Reinhard), a reference to Heydrich (who had been authorized to manage the implementation of the "Final Solution" and who was assassinated by Czech agents in May 1942 in Prague).

Because they refused to pledge allegiance to the Nazi party or serve in the military, Jehovah's Witnesses were sent to concentration camps, where they were identified by purple triangles and given the option of renouncing their faith and submitting to the state's authority.[447] The United States Holocaust Memorial Museum estimates that between 2,700 and 3,300 were sent to the camps, where 1,400 died;[411] in The Holocaust Encyclopedia (2001), Sybil Milton estimates that 10,000 were sent and 2,500 died.[412] According to German historian Detlef Garbe, "no other religious movement resisted the pressure to conform to National Socialism with comparable unanimity and steadfastness."[448]
These programmes are best seen as a series of linked genocides, each having its own history, background, purpose and significance in the Nazi scheme of things. The Holocaust was the biggest of the killing programmes and, in certain important ways, different from the others. The Jews figured in Nazi ideology as the arch-enemy of the 'Aryan race', and were targeted not merely for terror and repression but for complete extinction. The Nazis failed in this aim because they ran out of time, but they pursued it fanatically until their defeat in 1945. The Holocaust led to widespread public awareness of genocide and to modern efforts to prevent it, such as the 1948 UN Convention on Genocide.
First, the rescuer must have been actively involved in saving Jews from the threat of death or deportation to concentration camps or killing centers. Second, the rescuer must have risked their own life or liberty in their attempt to save Jews. Third, the original motive for rescue must have been to protect and save Jews from the Holocaust. Other motivations, not considered for qualification, include financial gain, protecting Jews in order to convert them to Christianity, taking a Jewish child with the intention of adoption, or rescuing individuals during resistance activities that were not explicitly geared towards rescuing Jews. Finally, there must be first-hand testimony from those rescued to verify the individual's role in the rescue. If testimony does not exist or cannot be found, there must be irrefutable documentation of the individual's participation in the rescue and the conditions surrounding it.
After the Wannsee Conference in January 1942, the Nazis began the systematic deportation of Jews from all over Europe to six extermination camps established in former Polish territory -- Chelmno , Belzec, Sobibor, Treblinka, Auschwitz-Birkenau, and Majdanek. Extermination camps were killing centers designed to carry out genocide. About three million Jews were gassed in extermination camps.
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.”

Every day, twins were selected for experimentation. He would require that they give blood and sometimes so much was drawn that a twin would faint. Some underwent huge blood transfusions from one twin to the other. In an attempt to change their eye color, he painfully injected chemicals into their eyes, only to result in infection. One night he collected 7 sets of twins with different colored eyes, killed them, dissected them, and then sent the eyes to von Verschuer for analysis. Twins as young as 5 were killed from experiments, then their bodies dissected. For one pair of twins, he attempted to create conjoined twins by sewing their backs together and trying to connect blood vessels and organs. A few days after the extremely painful process, the twins developed gangrene and died. Many twins had their limbs and organs removed without the use of an anesthetic. Other experiments included isolation endurance, reactions to various stimuli, spinal taps without anesthesia, the removal of sexual organs, and incestuous impregnations. Out of the 1500 twins experimented on by Mengele, only around 200 survived the horror.
How, when, and why the Nazis’ decision to exterminate Europe’s Jews was made remains one of the most vexed and disputed of all important questions concerning the Holocaust. There was not simply an order from Hitler commanding the killing of the Jews, and there is general agreement that the genocide evolved in stages, steadily becoming more comprehensive. The Origins of the Final Solution by the universally respected historian Christopher R. Browning, now at the University of North Carolina at Chapel Hill, is a magisterial examination of this subject in the wider context of the overall evolution of Nazi policy towards the Jews between the outbreak of the Second World War in September 1939 and the opening of the first extermination camps early in 1942.
The next year, 1942, marked the beginning of mass murder on a scale unprecedented in all of human history. In January, fifteen top Nazis led by Reinhard Heydrich, second in command of the SS, convened the Wannsee Conference in Berlin to coordinate plans for the Final Solution. The Jews of Europe would now be rounded up and deported into occupied Poland where new extermination centers were being constructed at Belzec, Sobibor, Treblinka, and Auschwitz-Birkenau.
On January 20, 1942, Reinhard Heydrich, head of the Reich Security Head Office, convened all secretaries of state of the major German ministries to the Wannsee Conference. This conference is generally held to have been a major turning point, whereby the “final solution of the Jewish question” in Europe by “evacuation” to the East and by other “means” was decided upon. But in fact, the mass extermination of the Jews on an industrial scale, made possible by the creation of death camps, was launched prior to this notorious conference.
The ideology of Nazism brought together elements of antisemitism, racial hygiene, and eugenics, and combined them with pan-Germanism and territorial expansionism with the goal of obtaining more Lebensraum (living space) for the Germanic people.[16] Nazi Germany attempted to obtain this new territory by attacking Poland and the Soviet Union, intending to deport or kill the Jews and Slavs living there, who were considered by the Nazis to be inferior to the Aryan master race.[17]