It's just, whatever THEY say must be evil and so let's find any old argument to say why, even if it directly contradicts what we said last week.
A post from BuntingEllacott last week was very illuminating - this is about creating a group and 'othering' anyone who is not in it. To paraphrase (and hope I've not messed it up): The language, buzzwords, mantras, flags, symbols, etc are all identifiers. They don't actually mean much or have to be true, they just have to be displayed so that members of the group can tell who is 'one of them' and who is 'one of us'. It's about displaying allegiance and affirming the group.
So OJ can tell us we are transphobes one week for wanting to observe the word 'lesbian' to mean 'woman', and then use the word 'lesbian' to mean what he wants the next week but he retains, in his mind, the right side of history at all times, because he knows he is on the right side.
I suppose it's the same as Damian Barr making a horrible joke about a transwoman's failed suicide attempt. He gets a pass and remains on the right side of history because he's in the right group. No matter what Damian Barr says he will never be described as a transphobe because he knows to chant the right slogans and show public contrition as penance, etc.
JKRowling makes a mild joke about the word 'woman' and has her books burned. Effigies of women are hung in Spain, and everybody shrugs. Graffitti on a wall in Spain and someone comes on a UK feminist board to berate us for it, somehow.
Probably purely coincidental that most of the ones on the 'right side' are males.
(FWIW of course there isn't a 'right side' of history. History isn't a binary, it's not even a fucking spectrum, it's a big old uneven mess that changes as we even look at it from different angles. Simplistic nonsense like this is what gets us into these messes )