Enb76, I'm with you up to a point.
And I think my point is the point when they want to be she/her, because although it seems like a courtesy, such a little thing that couldn't possibly hurt anyone else and would mean a lot to them, it's clear that this is the thin end of a wedge.
Because they want to use women's toilets, and extrapolating from that (I don't think unreasonably), all women's spaces. They see themselves as a woman and they equate that with female, and that is a risk to women (maybe not from this individual, but to women as a class, by men as a class).
While it seems simple to "be kind", this is truly the thin end of the wedge - they will not stop until they get complete capitulation. They will not accept any less that complete removal of any distinction between an XX female and an XY woman.
But there can be another way - they have clearly experienced discrimination, intrusive questions about their life and relationships, physical and emotional threats. None of this is right and none of it should be tolerated. A man should be able to be as feminine as he likes and express that in his clothing, makeup, hobbies, interests whatever and no-one should discriminate against anyone for that. I wish we were fighting for a world that accepted people whatever their appearance, for the bandwidth of men to be widened to accept all men, and not for women to budge up.