I agree with this, but I would emphasize something you glossed over, which is that the target is a "public figure." It's normative to be cruel to "public figures" in ways that would be totally unacceptable in any normal interpersonal relationship. I personally think that's fucked up, but it really is normative.
So singling out e.g. cruelty specifically about trans people's gender presentation seems targeted and political, because it's completely commonplace to say cruel things about someone if they made bad art, or if they disagree with you about some political policies, and rarely do people get banned from anything about it.