Just completely to clarify, without addressing anyone particularly:
I used to take a very, very second wave approach to trans issues. I actually decided to write my dissertation on feminism and trans issues, with a view to demonstrating via feminist theory and practice that trans women were not trans at all, but gender-non-conforming men who, due to the rigidity of patriarchal gender assumptions, felt they had no way to express their non-conformity but to mutilate their bodies and pantomime as stereotypical women, and that only feminism could save these poor chaps from themselves and allow them to explore their real natures and accept theose natures within their natural bodies. I was idealistic, and well meaning, and utterly, utterly patronising and wrong-headed.
I read masses of theory and accounts and research, starting with Janice Raymond, being faintly appalled by her vitriol and inconsistency (I'd been expecting her to be the cornerstone of my argument!), and moving through a 360 degree point of view change via intersex conditions, trans theory and accounts, and just a basic consideration of what it must be like to spend your whole life being told by everyone - society, your family, the medical profession, and then feminism - that you are wrong, wrong, wrong, not welcome here, there or anywhere as you feel you are. Having to fake male gender conformity to avoid being beaten and murdered; then having to fake female gender conformity to the medical profession to qualify under the incredibly rigid terms of that profession as sick and in need of help to get the treatment (hormones, counselling, surgery) that you need. Never being allowed to simply BE, to be taken at your word, and allowed to flourish without fear. Basically, I got some perspective, and found my empathy.
I was never convinced by the scientific arguments about brain types, psychiatric disorders, hormone imbalances etc, as no one theory stacked up entirely to explain trans, any more than any one unifying theory has emerged to 'explain' homosexuality. And I came to the conclusion the why of being trans was less important than the 'why is it a problem?" question. And this is where, finally, my feminism and my newly minted trans-allyhood met in the middle again. It shouldn't matter what people wear, what pronoun they use, what their interests and predispositions are, or what is in their pants. All these things may matter enormously to the individual, and their conception of themselves and their identity. But they are of no concern to anybody else. Or they shouldn't be, if what we believe as feminists - that being a woman should have no bearing on what we can do, where we can go, and who we should be - is true. In this less than perfect world, compromise and courtesy on all sides are the way forward. Fortunately, if you look at it, the interests of trans rights and the interests of women's rights intersect at numerous points. We don't all have to agree with each other - just respect each other.
Overall, in relation to this thread, I just really feel for any trans child, who is already going through it in this imperfect and not always tolerant society, whether this is their true identity or 'just a phase', being made to feel even more bizarre and unwanted and sick and dangerous by adults who ought to know better.