Bankrupt from The Get-Go
In regard to the popular (especially in academia) ideology that the truth of a proposition is solely a matter of the race, sex, class, and gender of the person stating the proposition, do the proponents of this view suppose that every member of such an aggregate (e.g., every black person, every gay person, etc.) holds identical beliefs?
If so, their overarching model of propositional validity is obviously bankrupt from the get-go. Of course, one’s beliefs may be conditioned to some extent by one’s membership in such aggregates, but an insistence that such group membership overwhelms individual, within-group variance of views would appear to be indefensible.
As always, collectivization of individuals along any lines whatsoever poses a great risk of obscuring or distorting what actually matters for action — individual attitudes and beliefs.