But are they wrong?
Anti-Trump responses make sense. He's the most polarizing US President in recent history and almost everything he's done has been bad for the US (ok of course this is arguable but hold on while I make my point). Him leaving the platform was good for Twitter and for democracy. If he comes back as a candidate then he'll likely come back to Twitter, his account has already been reinstated.
Omar, if she breaks Twitter rules, can, and should, have her personal account suspended. As a sitting congresswoman she is entitled to her official handle. Unlikely to get deplatformed, so not an issue.
J.K. Rowling's takes on the transgender community is not even something I want to touch. It's too toxic and complicated to do so. That being said if -- see a pattern here? -- she runs afoul of the Twitter rules (whatever they may be) her personal account can be suspended or banned.
Briahna Joy Gray -- of course there are extremists on the left -- but if they don't oh I dunno -- incite a violent riot to overturn an election -- then I doubt she'll be deplatformed, though if she calls for violence or ... which would run afoul of rules ... see I am starting to see how the pool analogy really does work.
I know my stance on censorship is not a popular one. I have struggled with it myself. But I think it is self-consistent and I stand by it: let the wierdos, racists, nazis, hate filled folks scream into the void of their own making on servers they own to others that subscribe to their bullshit. As for me and the rest of the civilized world we'll continue to swim in clear, shit and pee-free water. ;-)