At the recent NPI conference, Jared Taylor eloquently framed the Alt-Right as being less a racialist project than an anti-egalitarian project:
And Alt Right of course includes an entire panoply of egalitarian orthodoxies that we reject. It’s not just race. It has to do with the idea that every culture is equal to every other; all religions are equally sane, and valid . . . The sexes are basically equivalent . . . All of these orthodoxies. There are many many views within the Alt Right. It cannot be summarized as simply a racial conception.
Once one rejects the creeping ethos of egalitarianism, and embraces the concept of human biodiversity, then categories of race, sex, and other differentiating characteristics become salient.