So the “white” thing is interesting. White supremacists like to talk about “white culture” and “white identity,” but in practice being “white” means having no culture and having no identity; whatever culture you originally possessed has been assimilated to the general American anti-culture of mass consumerism and social climbing. You have become the atomized individual, without family or communal ties, which is required by the capitalist machine. This evident in the way European immigrant to the US have historically not been considered “white” until their original culture is entirely lost; even the Germans, who are about European as European can be, were for a long time somewhat stigmatized as “Dutchmen.”

In other words: people who are proud to be “white” are fighting for a cipher, something which, as you said doesn’t really exist. Maybe in remote parts of Appalachia, say, there is something approaching a “white culture;” but even that is more a regional Southern thing than it is a “white” thing. White persons in (say) Washington or Seattle have little in common with it, and it seems to them quite foreign and “exotic.”