I'm sorry, are you actually arguing that you cannot call people Nazis, but only Nazi-adjacent?
You were not "defending a Nazi from an accusation of murder". You were defending a Big Lie that the Nazi produced - saying "no Elon says it wasn't a Nazi salute so it must not have been a Nazi salute". It was obviously an intended Nazi salute, and all the excited white supremacists took it as exactly that. Elon said it wasn't as a Big Lie, because that's the point - he has the *power* to both do the bad thing and then straight up say "I didn't do that", because honesty is only a virtue for the conquered. Perpetuating the Big Lie in the face of evidence is absolutely Nazi *behavior*. Please stop it. I realize that someone upstairs was directly calling you a Nazi and yeah, I understand you saying "but I'm not!", but I think you should look at it a bit more like they are strongly suggesting some of your actions are this Nazi-adjacent, which no one who still values empathy wants to see from you. You can stop. Being a Nazi is a lot like being an asshole - we can stop the behavior, stop protecting the false narratives, and come back to humanity, at least as long as we haven't performed actual crimes we will be hunted down for.
Thing is, it isn't just Auschwitz which defined the Nazis. It was everything they did up to and including that point. I would hope that we can get to the point where we name, shame and blame these fascists in America before we get to the normalizing atrocities point. If people are not allowed to do that, then we're going to get to the normalizing atrocities point, and our surviving generations are going to be stuck with that. We will be the enemy of the free world until we are beat down enough to break us.