The Holocaust: Questions

Even though I understand how bad of shape Germany was in at the time, and how desperate and easily led these people were, it is confusing how no one stepped in to put a stop to the actions taking place. In fact, England and France actually helped Hitler through appeasement. Mostly I understand what was happening, why no one left, why no one helped, and why the Germans were so easily misled. Evil was under foot, an infectious evil that soils and devolves the minds of impressionable humans into those of bloodthirsty, judgmental beasts. Human nature is mostly a horrible thing. It reveals our true intentions underneath and is easily led around by the nose by corrupted ideals, allowing atrocities such as the Holocaust to take place.