Years ago I was able to get along with trans friends on the basis of a shared understanding:
that they thought they had a body-incongruent gender identity that required medical and legal solutions
and I didn't believe in gender identity but did accept that they were free to seek physical alterations, and that laws exist enabling them to be treated as if they had changed sex.
I could be completely honest and they did not call me a bigot, just someone a bit literal-minded who needed to be educated at every opportunity.
I wasn't really listening. Then - for personal reasons - I decided to read up on the topic, and discovered (scare music, insert very bad consequences of GI here 😱).
I took my insights back to my friends, but now I had a problem. I could tell the truth and nothing but the truth, but telling the whole truth was obviously going to cause emotional carnage. My friends have delusional beliefs, and they are defending them (presumably unconsciously, as they are clever and well educated) with every manner of sleight of hand: bait and switch, false syllogisms, undistributed middles, claims to arcane knowledge, appeals to authority, emotional blackmail, category errors, applying the benefit of the doubt to the complementary assertion, you name it.
Just one example: 'single-sex spaces are a great idea as an alternative to trans-inclusion, but is it realistic? We can't pander to every niche request'.
(Just to add, allies are even worse, because they quickly detect, and disapprove of, my terfiness, whilst trans friends of both sexes blithely assume I agree with them about everything unless I wear an I❤️JKR t-shirt. Which I don't)
So I keep trucking on. Trans friends are paranoid and unhappy because of all the 'hate' so I still see them, but my tentative truthfulness will never change their minds.
I realise this all makes me look a bit stupid and treacherous. But what can I say? It's all mad, just mad.