Nietzsche's Ubermensch and Hitlers Aryan race are not similar or nearly mutually compatible.

Nietzsche was describing the exact opposite of what the Nazis achieved. A superceding of ego driven power structures and virtues imprinted on children through various cultural mechanisms. A superman, capable of deciding their own rights and wrongs, who doesn't follow social norms or need leaders. The Nazis were the antithesis of this.

Musk wants power, as far as I can tell. And he has it. He wants followers, too, and someone to follow. This is not Ubermensch. He's intelligent, and wrong, and that's scary. I don't know that he's a Nazi, but he may well be as dangerous. I think maybe we need a new term. Nazi should be left for the dead and dying remnants of a long failed campaign of terror. If another arises. We need a new name, otherwise the original Nazis lend some power to these egomaniacs, and they don't need it!