There's not much of anything related to intellectualism when it comes to the alt right. Their beliefs are based on white victimhood and bogus scientific racism that has been debunked for decades.
I've lurked the alt right sections on Reddit and they're all over the place. Racism, sexism, islamaphobia, you name it. One thing they have in common is hate/fear of women and people of color. They sincerely believe that women and nonwhites wanting equality means they will lose their seat at the table. There's no real way to reason with that thinking when statistics prove them wrong over and over, and they just shout about biases.
Their side does fascinate me in a weird way, but like
@Althalucian said, you have to be careful when legitimizing their POV. Most of them aren't interested in actual conversation or debate.
Mother Jones actually has a few interesting articles about the alt right for people who want to look at them from a safe distance.