In order to comprehend Hitler's reasoning, one must go back to evolution to understand why he did the things that he did, and thought the way he thought. Hitler slaughtered the Jews and hated the blacks because he was an evolutionist. He thought it was his duty to aid evolution in improving the human race. He taught and believed that each of the different races in the world were actually different species of man, and that it was the job of the superior species (Germany) to annihilate the inferior species.