HOT TAKE LOL (so hot I will make everyone else's takes look cold, probably /not entirely serious), since people are talking about this (I mean, I've mentioned it before, but I'm seeing it making waves again, so here we go again :p)
That is, the only thing I think is important is consent, so if it's consensual, then I support it, which means transhateful/transharmful/etc. AND even cishateful/cisharmful/etc.
Again, one distinction I see is 'cis = really that thing & trans = not really that thing', which is used in defense of transhateful/transharmful/etc. IDs, and also a point against them (like, 'I see trans people as their IDs, so I disagree with them just like with cis people').
And I am one of those people who think trans people really are what they say they are (unless stated otherwise), AND I still support transhateful/transharmful/etc.
Yes this is about the infamous transnazi label, but also any other hateful/harmful ID, transsexist, transracist, transableist (not that anyone ever seems to ID as the last, but whatever), etc. and yes this also includes the cis versions (I mean, I'm cisharmful, much love to my pookie bear for that <3)
Literally, all I care about consent, and not just because 'well if it's consensual then it's not actually harmful', no no, I really think people should have a right to harm themselves and others, it's their life, and that's not anybody else's decision (I say, even though this is a conversation about other people, but in my defense, I'm cisharmful, so this technically is about my life too).
And the labels specifically I don't care. Like, I don't care if someone IDs as cishateless / cisharmless / just like, cis-anti-bigotry, or even without the prefixes, if they're going around unconsensually saying/doing bigoted things, that's still shitty. So I support the opposite direction too, if they're being consensually bigoted, that's still cool with me (again, not that my opinion matters, that's kind of the whole point, but you know).