He’s actively platforming white supremacists, Nazis, and far right ideologues (people who have caused actual, tangible harm), normalizing their rhetoric and actions, and making it impossible for anyone on Xitter to push back or even report harassment from these kinds of hatemongers. He is literally bringing the worst parts of 4chan, Breitbart, Stormfront, etc to the mainstream and trying to make it seem normal.

He’s also a natalist and a longtermist, which are just euphamisms for eugenicists. He’s not trying to make anything better or interesting, he’s trying to create a white supremacist world where only white cishet christian men have status, where women are just vessels for procreation, and no one else has any place. The only reason he wants to go to Mars is so he can have a white ethnostate built on the backs of slavery, where no one can do anything to stop him.