The part where you're wrong is when you assume I'm using "nazi" to refer to anyone I disagree with. Maybe some people do that, and that would be both childish and incorrect. Similar to some people using "communist" the same way.
However, that's not how I use the terms. I have more than a surface-deep level of understanding pertaining to fascism, and I'm capable of recognizing the signs and symptoms. Are you?
Anyone who's been paying attention can see the resurgence of fascism happening plain as day. People openly praising hitler should not be normal. People doing nazi salutes or parading nazi flags should not be normal. Government officials instituting nazi-esque policies, with nazi-style tactics, for professed reasons that are reminiscent of nazi-like worldviews, should not be normal.
Your comment is no different from when tankies get upset when I call them tankies, and they claim that I'm only calling them that because I disagree with them. No, I only call people tankies if they're behaving like tankies. There are specific argumentative styles that distinguish them.
I'm perfectly capable of disagreeing with someone without calling them a nazi or a tankie, if they're not behaving like a nazi or a tankie. If they are, then their behavior needs to be corrected. If they refuse to correct their behavior, then they should be rejected, shunned, and removed from polite society.
Society cannot tolerate intolerance, or else it will become an intolerant society. And the only people arguing otherwise do so only to try to justify their own intolerance.
So it's pretty sus that you come here trying to obfuscate things by claiming it's childish to call out nazism (or if you prefer more generally, for technical accuracy, fascism; although literal neonazis have also made a resurgence).