But if more black women saw what many trans-identified men think of them as aka don't really consider them women because they aren't white women, I feel like they'd sooner see how misogynistic and racist the ideology is.

So much this. I'm white, but I've never been confused about whether a black woman was really a woman. It's the sort of thing where raising the argument says more about the ones making it than the argument itself.

the trans thing seems to be more of a white thing then a black thing because black people have "culture".

I'm not sure I agree with this claim, nor that it's the reason why we see more white transbians than black. Imo, "white" in the US has been coded as "American" - mind you, that's not how I think it should be, just an observation. Because it's nonsense anyway, so many traditions in the south that are coded as 'black' are also just 'southern' traditions that I grew up with. Part of that is because of slavery, but also just as a rule of human society we adopt culture from those around us. And it went both ways, black Americans don't have the same culture as black Africans - the former has American culture and the later has African culture.

Anyway, white people have culture. I think the difference is that white middle/upper-class suburban culture IS tied in with seeking equality/fairness/justice for everyone and blaming themselves for all the world's woes. Working class white people don't have that culture, and neither do poor, rural, or inner city white people - but generally the Powers That Be care as much about Those Whites as they do about black people who don't toe the party line. So we don't hear about the white or black or other races who reject this nonsense. The only people who matter are those who have made it part of their culture(upper/middle class whites) - because they're the useful idiots for the establishment.

I agree that it's possible the homophobia in many black dominated spaces is why it's the gay black men who tend to transition, though. And it makes sense that this is why more black women see transgenderism differently(although my impression was that more than a few of them think it's complete nonsense and aren't afraid to say so?).