We're not talking legal, if we're talking legal he can do whatever he wants with twitter, can't he. What I'm saying is that this clearly establishes that he doesn't give two shits about "free speech" or whatever, as long as he or his business concerns are on the receiving end.
I don't think even Musk thinks doxxing falls under free speech. That would be like saying "I never committed fraud, it was free speech" when stealing from someone online. Bullshit, not a single free speech absolutist thinks that's how it should work, I don't see why Musk should.