It won't be his downfall. He still owns SpaceX, which is starting to become very influential. He still owns a large part (though less than he used to) of Tesla. If (when) Twitter crashes and burns, he will get sucked further into his dark abyss and I expect he will become the next Thiel / Koch and use his money to fuck the US political system even more than he's already doing.
For first point: https_//twitter_com/libsoftiktok/status/1592655096252608513
'Supports' does a lot of work in his post, 'mingles with' or 'enjoys the content of' is closer to the truth. Philosophical alignment with that kind of characters betrays contempt for certain groups.
For second point: https_//www.thefader_com/2022/12/13/elon-musk-talib-kweli-twitter-ban
A few boos are enough to make him re-platform a dude with that kind of public record? It shows brittle spirit, as his friend Dave Chappelle would say.
For third point: https_//nymag_com/intelligencer/2022/12/elon-musk-smears-former-twitter-executive-yoel-roth.html
This one is the one that's serious, this kind of thing could amount to stochastic terrorism, but no one cares, because he's rich beyond measure, and that makes people excuse his every indiscretion.
It was a cursory google search, and while the burden of proof is on the one making the statements, it costs little to check it yourself.
It definitely isn't a good look for him, and while looks aren't that important, it does paint a picture of a man that has principles only outwardly, a man that is petty, and a man that thinks the world bends to his very word. It doesn't matter, though, the title 'billionaire' tells us that much, and grants him those powers.
He unbanned Taleb Kweli, who was banned for using twitter to stalk, harass, and organise mobs against a woman he didn't like.
His campaign against Yoel Roth has resulted in Roth and his family having to flee their house.
He's very, very happy with threats, including death threats if they are people that he doesn't like.