The Nazis great crime wasn't that they did all that stuff. It's that they did it to other Europeans.

The Nazis actively drew from Manifest Destiny, the Armenian Genocide, and Boer War concentration camps as inspiration for their project.

Everything the Nazis did was deemed entirely permissible by the so-called Civilized world, so long as it was done to people who weren't white. And Israel gets a pass for very similar reasons.