Those two groups, among others, were clearly attacked and murdered on the basis of fear that these people were going to destroy their way of life.

That was exactly the argument against those groups. It was based on fear. It was based on the idea of saving the world from evil people, and it became the yardstick of evil.

Be careful about whipping out your justifications to separate your actions from the Nazis’ on arbitrary grounds. The key factor is that, for fear of over privileged groups destroying their nation, they made the decision to oppose them brutally, and that turned into the Holocaust.