I've seen people say on Twitter that they will unfollow anyone who says "I will not date a trans person". Some people (as Milo Yianopoulos has pointed out) view a statement that one does not view a person with a particular aspect as ever potentially sexually attractive as itself a form of hate speech. Is that next?
Ben Shapiro says it all well on "Twitter v Science" on Dailywire. Go back to high school biology and take another final exam.
Jack Dorsey might want to look up the Selective Service System rules, which require registration by males according to biological sex at birth and which would "deadname".
Update: Nov. 30
Parker Molloy, a trans woman, argues for the New York Times how Twitter's policy promotes free speech -- for certain persons. She also says that the context of "Men aren't women" was "trans men".