Dehumanization is apart of the steps for genocide because you are downgrading a specific race. Hitler felt as though it was the Jews fault for why they lost the war and they had to pay. He brainwashed the people's mind to believe that the Jews are at fault. There is no clear reason why he hated the Jews. He claims it has always been a personal struggle in his book Mein Kampf. Millions of Jews,were slaughtered because of this. This is apart of genocide because he had a struggle with Jews all his life. So he made Germany believe it was their fault, that is why it wasn't "murder" in their eyes.