Presumably buying a Tesla and believing that its the best car in the world, also that Elon musk did everything alone and he's the reason Tesla exists(not true, elon didn't create Tesla).
The things he said about freedom of speech ("free speech absolutism", etc.) made a great impact on people. To be fair, there was also some merit in that narrative as censorship was indeed happening in Twitter 1.0.
It's quite easy for a commoner or pleb to think that Elon Musk is single handedly taking on the "mighty establishment" on behalf of the common people. The "Modern day Robin Hood" is a kool-aide stereotype which isn't easy to shake off and Elon seems to have been successful so far in that narrative pitch.
They're the right-wing commentators and conspiracy theorists who see Twitter as everything wrong with modern society[0]. To them, no matter what Musk does, it'll be beneficial for them. Either Musk reworks the platform to be amenable to them or he drives the company in the ground. Right now he's doing both, so for them it's an absolute win.
That's the flavor of kool-aid Musk is deliberately drinking from and once you realize that, most of his actions make some amount of sense (whilst also having a distressingly low concern about his personal fortune, something which makes it clear that when it comes to right-wing radicalization, he's firmly within the "sucker" group, rather than the "grifter" group; the latter is flexible with their beliefs if it risks losing personal profits, Musk isn't), like the utter nothingburger that is the "Twitter files"[1].
[0]: Point of clarity - this is the people who Musk surrounds himself with, I am not saying anyone who thinks twitter is negative on society is a right wing commentator or conspiracy theorist. Musk specifically is talking and listening to policy advice from these two groups and this is what those groups generally believe.
[1]: Which so far have been extremely boring and generic content moderation requests rather than proof of any "inside jobs" and restatements of old news.