Despite exhaustive debate, there is still great controversy about why and how an event so horrifying as the Holocaust could have occurred.
No consensus had been reached, but most historians point to number of factors:
The German peoples sense of injury after WWI
Severe economic problems
Hitler’s control over the German nation
The lack of a strong tradition of representative government in Germany.
German fear of Hitler’s secret police.
A long history of anti-Jewish prejudice and discrimination in Europe