This just exposes the hypocracy and double think of the whole self identification debate that allows people to deny biological reality of sex, but apparently not of race.
But the whole "transracial" movement does have some supporters. Dont forget it was a member of a TU group for those who "identified" as Black that got Linda Bellow cancelled as a speaker on Black rights issues. You couldn't make it up. But it does happen.
But useful link to have when told that of course gender self identity is valid, you can ask why then isnt race self identity valid?
I think it also shows in some strange way that in men's eyes women have the least legitimacy of anyone. Women are whatever men tell them to be.