Helen Joyce pithily put it. Trans themselves are less the issue in this battle of ideas, than the allies, the vast vast majority being cishetero. For them, they had no PoC civil rights battles to truly fight, or gay liberation.
This was all well before they were born.
Sure, a few BLM and Extinction Rebellion demos got their juices flowing, but the real emotional release comes regarding trans liberation, this is the neo religious one, the existential one, the one that really differentiates your herd, and gives you full reign to hit hard as you purity spiral down.
Only the tiniest minorities are anti gay or anti black or don't care for the planet. But the schism in trans is absolutely there (nearest thing to it being Remain Leave divide on Brexit). And thus TRA demands radical adherence, magical thinking as reality, and constant demonstration of true belief.
That's why the Guardian TRA reviewer of RóisÃn has to show her credentials and mastery of fake news and propaganda, not just as an addendum or a seperate piece, but within the piece.
Trans are one thing. Their allies are a whole other species.