It’s more than that.
Maybe you might have to be socialised as a woman for a long time to properly understand the righteous white hot rage that grows in many of us (especially in recent years) towards male violence and male entitlement.
I have that rage, but I don’t see trans women as men. That isn’t my starting point.
It’s possible to not have that rage, see trans women as men, and for your trans-exclusion to be detached and philosophical. Or even to be de facto “pro trans”. I’d suggest many of the cis male posters here fit Ito this category. And some of the cis female ones.
But when you combine that belief that deep down, trans women are men, with the justified rage against male violence and entitlement, you get a position that is fiercely driven. I think left and right in that context are entirely fucking irrelevant.
I’ve had to do a lot of intellectual and soul-searching work to understand why a minority of my intelligent, compassionate, left wing feminist friends were holding a position so far from my own. It has taken me years, and this is where I’ve got to.
I still disagree with those women. I still want to be a voice for what ime seems like an often overlooked majority of cis women who do include trans women into a broader category of womanhood… but I’m certain that in a lot of cases, the views opposing are not about latent social conservatism - they are about the trauma of a lifetime of structural violence and patriarchal oppression.
I think there are definitely what I think of old school TERFs out there. ie. literal trans (women) exclusionary radical feminists who perhaps at the same time would be willing to fight for the sex based rights of trans men but who are very definitely pissed off feminists who also take a sceptical position on the trans question. I think what you've written is a good summary of the state of affairs on this thread and a good summary of that old school TERF position. However I don't think that's quite the place the bulk of gender critical feminists are at. I also think that the two voices on this thread who are articulating the mainstream GC viewpoint on this thread are actually both male.
Regarding this current mainstream GC view (among women), my sense is that there may be rage at the general state of affairs that women live with but the overriding immediate concern is
fear that this trans agenda is advancing. Whatever its origins I think it is now first and foremost a single issue backlash against the Gender Recognition Act. The feminism is still there, but it's now the small print. I think the main issues are
1) Protect women's spaces from transwomen
2) Protect children from the encroaching trans ideology
3) A quite abstruse (IMO) concern about the erosion of biological concepts
My sense is that it's 2) that is actually the most powerful driver. If you look at what JK Rowling wrote in that essay, she thinks that she may have been encouraged to transition because of her childhood trauma if she were a child now. There's a recent interview between Kathleen Stock and Julie Bindel on youtube where they opine that parents are encouraging gay children to transition in order to avoid the stigma of being gay. They think that trans women are a physical threat, but they also think the trans agenda is out of control and brainwashing the schools, the doctors and of course the kids. The former threat is a bit obscure simply because there are so few trans women, but the latter is vague, amorphous and affecting everyone all the time. Most of the rhetoric is about TRA's not about trans women and under this view trans men are just as much an ideological threat as trans women (unless they jump through all sorts of ideological hoops).
If you look at 1), 2) and 3) above, the message conservative men receive from them is
1) The trans agenda is harming women - protect women!
2) The trans agenda is after your children - protect children!
3) Enshrine the differences between men and women like in the bible or in whatever cod evolutionary psychology theory they're into.
Ironically enough, this message actually reaffirms male gender roles rather than challenging them. And because the GC movement is single issue it's happy for these men (and similarly minded women) to misread the message because they want to create as broad a movement as possible. The goal is not to advance feminist ideas, the goal is to defeat the trans rights activists and reverse the GRA.