His daughter transitioning and being liberal drove him to the far right on Twitter, because he couldn’t accept it.
Those people kept telling him he should buy it to “save” it.
He started talking about it, and that’s where your article picks up.
It wasn’t just a whim, he had reason to start talking about buying Twitter, then was forced to actually go through with it.
He thinks he’s “saving” it because conservatives believe everyone thinks like them and are just scared to admit it, but his intentional actions are killing it.