You made a good point. There are definitely people who are actively trying to ruin the world, and that is a direct threat to mine yours and every one elses life. So then getting rid of these people should fall under self defense.
Except one group was clearly attacked and murdered based on unfounded racist fear and nationalism eager for “others” to feed the fascist machine, and the other group willingly chose to abandon critical thinking and defy the recommendations of the medical science community doing its level best to fight a novel and deadly contagion. The Jews were “asked” to wear yellow stars and rounded up because of who they were. That was indefensible. The Communists were rounded up because they were political opponents of the NSDAP. That was indefensible. Modern citizens across the world were required or asked to wear masks, observe a larger personal space bubble, and quarantine for the safety of everyone by governments large and small across the world in an effort to protect everyone from a virus that doesn’t know or care about the political leanings of its victims. Individuals willingly defiant of such measures intentionally and recklessly put everyone’s health and safety at risk, to deadly effect in some cases. That is indefensible.
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.
