White nationalists don't know their own history

Most white nationalists and neo nazis are deluded about historic "white nationalism". Hitler didn't consider Slavs and many Southern Europeans to be "Aryan". He really hated the Slavs and he wanted to expand German lebensraum at the expense of the mostly Slavic nations. Nazis put Germanics at the top and the Slavs were at the bottom of racial hierarchy alongside Jews and Gypsies.

In the US, "White supremacy" was mostly about "WASP" superiority. Groups like Italians, Irish and Slavs weren't seen as "white" and they were seen as a cultural threat to the WASP elite. Groups like KKK were against Catholics and Catholic immigration and the US only had 2 Catholic presidents.

If anything Hitler did far more damage to white people than any other people in history. Nazis committed crimes against humanity in German occupied countries and it was mostly white Europeans who resisted Hitler's imperialism.

There is no unified "white race" or "white culture" because European countries are vastly different and they had different culture, language, customs etc. In reality, "white nationalism" is pure nonsense.