When I first found r/gendercritical on reddit, some of my earliest questions were the distinctions between it and radical feminism. It seems the answer to that question is all radical feminists are GC (or hold gender critical views) but not all GCs are radfems. I would venture to even say that GC is not even (if it ever was) a branch of feminism as there seems to be so many people who are not feminist (or support women-centred values) by any description of the word who are GC.
The entire disagreement reminds me of Elizabeth Cady Stanton and her activism which prioritised suffrage for white women ahead of black men and women. Stanton was also a very effective campaigner and very eloquent.
I think a lot of the problem can be attributed to the invisibilisation of non-white women in this conversation and a conversation about intersectionality. As an African, I navigate society thinking about the parts of my identity that are most visible, my race and my sex. For black women, it is impossible to prioritise one over the other. To choose to support women's rights at the expense of immigration laws, racial laws, etc. Or to support race at the expense of gender (African men are misogynistic and only able to understand equality and privilege when it affects them while being completely blind to gender inequality). So both must progress at the same time which is difficult or impossible and quite a thing to aspire to.
So it's quite distressing to see white gc campaigners collaborating on trans activism with white racist organizations. From your perspectives, I think it seems to be just making use of the tools in your toolbox. But to black women or immigrant women or lesbian women or women who are black, immigrant and lesbian or possess some other minority identity, it must appear to be a collusion or a betrayal.
I know people say the enemy of my enemy is my friend in justification of this. But what about when this new friend is the enemy of your friend? I just don't see that analysis. There are also other tensions between immigrants and the working class which appear to be another thing which could potentially be exploited by anti-immigrant groups.
Audre Lordes' "the master's tools will not bring down the master's house" comes to mind here. I fail to see how racist, sexist, anti-immigrant groups will protect the interests of women beyond idk trans rights. Many lesbians will be targeted as will be gay men and non-gender conforming people. Is the GC movement simply traditionalism/conservatism? What about abortion rights?
I don't know what the solution is really. If white GC campaigners are convinced that the way forward is only to further collaborate with these groups then they should be aware that they'd also likely lose the support of women belonging to these other groups who have been traditionally or historically protected by the left. While the left seems currently unable to distinguish between male and female, the right does not care about male and female in their campaign against black people. From their perspective, I think it's clear where more safety lies.
I think it's important to be pro-women and not just anti-trans. And being pro-women would or ought to involve thinking about women of all social groups and ages. But then again that might be too much for GCs to do seeing as it's a single issue campaign.