> What I'd like to figure out is how there are still so many Nazis despite readily-available facts that Naziism is racist delusions?

You're equivocating between two different meanings of "Nazi" in this sentence.

> And how are countries like Germany still doing kinda okay despite making it illegal to do Nazi stuff?

They aren't, they moved the Overton window so far via a ratchet effect that they're unable to calmly discuss immigration policy.