Contrary to official distortion, the Alt-Right ≠ White Supremacist. As a matter of fact, from my research it appears the Alt-Right = Asian and Jewish Supremacy.
The salient feature of Alt-Right belief appears to be that IQ tests measure something real, and that something has a high correlation with success in most fields, probably even in living a successful life itself.
Of course some consequences of that belief are troubling to the Left and to the establishment. The establishment says that all groups would do equally well if there were a level playing field. Under that view, if a racial or gender identifiable group does less well than other groups it cannot be due to differences in average abilities but must be due to ugly acts of the majority peoples. These ugly acts unjustly hold down people who deserve more success.
If IQ were a measure of something real and consequential, and if the distribution of high IQ in different groups were unequal on average, than there is an entirely different explanation for the different outcomes. Suddenly the majority is not necessarily collectively ugly and unjust.
I’m pretty sure it is established fact that Ashkenazi Jews and North Eastern Asians as groups have average IQ test scores above those of other racial/ethnic groups. So if you want to talk about which race/ethnic groups an adherent of the Alt-Right would expect to excel in a fair contest, it would be Asians and Jews.