If that evidence is not available, then it is imperative to the integrity of Wikipedia that that statement be edited, revised, or simply removed. If that statement is going to stand, then evidence supporting that statement should be provided. The listing of them as “white,” however, does not have such intuition unless you are racist against white people. There probably are intuitive reasons to suspect that most incels are male and heterosexual. There is no data or evidence cited or provided to support the statement that self-identified incels are “mostly white, male, and heterosexual.”