Yknow I'm sure we can all remember when gay marriage, teaching gayness in schools, etc was a big sticking point, and it seemed intractable, and maybe even people whose opinions you could muster up an ounce of respect for justified their anti-gay viewpoints with crappy misunderstandings of the law, like "I just don't think churches should be forced to marry gay people," "what about freedom of religion, eh?" etc.
I remember reading our very own Prime Minister saying in the book Have I Got Views For You that if gay people can marry, he sees no reason why a man can't marry a dog. And it didn't strike me as a particularly unusual or egregious argument; it was the same argument that a million other people were making. It was 13 and a half years ago that I read that book iirc.
And nowadays, these arguments seem like ancient history. If you said to the PM that he once compared gay marriage to bestiality, he would hide in a refrigerator. Hell, even Hilary Clinton and Barack Obama came out strongly against gay marriage around that time.
So I expect this whole trans 'debate' to go the same way. I also think that terfs and their far-right supporters such as Julia-Hartley Brewer or Brendan 'Forehead' O'Neill are probably still anti-gay but recognise that their beliefs are odious and career-ruining nowadays, but they can still stick the boot into trans people. For example, I recall terfs being horrified that 13-year-olds were being taught about anal sex in school, which seems to evoke Section 28's ban on pro-gay education to me.
The Man is very successfully making this a wedge issue at the moment. But once the mainstream argument ceases to be "do you think that JK Rowling deserves to get rape and death threats for saying that biology exists," and becomes "do you think that trans people deserve to be treated with basic human decency, or should they be automatically distrusted," then the wedge will disappear and a new wedge will be created in its wake. There's a reasonable chance that in 13-and-a-half years' time, a lot of the key proponents of terfery will be six feet under, and the blue-haired youth will be starting their own families, and the mainstream media will be even weaker.