If one can argue the sexes are a social construct, then they can argue race is a social construct. For reference, they already argue for both, even though both are false, and both differences are caused by genetic differences. Race, however, is a special case, because they still think White people, and "Whiteness", are inherently evil, so they're less likely to accept race as a social construct when it comes to White people, whom they deem as evil, colonizers, Nazis, racists, etc.
It's philosophically indistinguishable.
If one can argue the sexes are a social construct, then they can argue race is a social construct. For reference, they already argue for both, even though both are false, and both differences are caused by genetic differences. Race, however, is a special case, because they still think White people, and "Whiteness", are inherently evil, so they're less likely to accept race as a social construct when it comes to White people, whom they deem as evil, colonizers, Nazis, racists, etc.