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His gesture was _exactly_ like Hitler's.Hitler's was unlike the general population's, as it had a bend to it.
You can bend reality all you like, but the intent of giving the Hitler salute was not there, as he has said. He's not secretly a nazi, and he's not openly a nazi. He's right-wing, yes. That's not illegal, and it happens to be the majority vote in the US.
The most reasonable criticism is calling it a Roman salute and saying it bears connotations to imperialism, and that it was most recently practiced by Hitler.
I think, if you want to read into his deepest, unspoken intents, he probably compares himself to Caesar more than Hitler. Just like Zuckerberg, and all the other multi-billionaires who want to see themselves as the de-facto leaders of the world.
> He's known to be a white supremacist
No, a bunch of observations leads you to conclude it.
He never showed up at a white supremacist rally.
He lets them speak on his platform.
> He supports far right parties in Europe.
Most right-wing parties in Europe are still socialist by American standards.
For example, the most liberal parliamentary party in Denmark thinks a 40% tax is fine.
If you're a Republican, you're crazy in the eyes of a European.
Specifically, he supports a far-right party in Germany, which is controversial, since there hasn't been popular far-right parties (only fringe ones) since NSDAP.
The big, controversial subject is ending muslim immigration into Europe. The far right becomes the bannermen for this cause, because closing down on immigration is viewed as xenophobic. In the meantime, as this opinion is being suppressed instead of addressed, it continues to grow with the populist movements.
The fact that Elon Musk has opinions on European immigration policy doesn't make him a nazi. Just like being against muslim immigration doesn't make AfD nazis (the German party that he endorsed), just uncannily populist.
> Someone who hadn't meant it would have come back on stage, when it was pointed out to them, and made an apology. Or at least immediately issued a statement/press release.
That's how I read his sentence immediately after the salutes: "My heart goes out to all of you." -- it sounded remarkably like something someone would say when they realize what they did could be viewed as heiling. You don't need to apologize to be a good person.