I don’t know if we can paint alt-righters with the broad brush of racism and supremacy. There’s a lot of nationalism and pride among those types, and I think it deserves a nuanced treatment.
In all parts of the world, there is nationalism and cultural pride that does not rise to supremacy. I think it is important to appreciate one’s homeland and own culture. It is good for me, for example, to enjoy Irish culture, to listen to fife and drum music, watch step dancing, eat soda bread, corned beef and cabbage, and generally enjoy being Irish.
I think with the “cultural Marxism” as @WingedHussar brings up that Whites are taught to be self-hating. We are taught that we have “white privilege” and that we are all racist. We are taught that diversity and inclusivity must be achieved and maintained, by any means necessary, at any cost possible. No wonder there’s a reaction to that! It’s reprehensible.
I have nothing against all races being represented proportionally at all times and wherever possible. Equal opportunities should be given. Nobody should be taught to hate, especially not themselves. And no culture or ethnicity should be artificially overrepresented for the sake of some PC diversity policy. I feel, it’s good to be White (Irish), don’t force me to be sorry for myself!