I think that aside from the Holocaust, the other pillar of Nazi horror is that it brought to Europe practices and methods used till then by Europeans against Third World colonies and darker skinned folks. I note that a decade after the war, the UK didn't have a problem with large scale concentration camps and a massive military operations affecting non-combatants, including starving them, as long as it was in Kenya...

The road of excess leads to the palace of wisdom - William Blake