That's just prejudice agai st people with pale skin which could ve any number of ethnic groups. Racism is part if a whole structural system that undergirds the economic reproduction of society. In this context "white" doesn't actually apply to an ethnic group, but to an ever-changing and amorphous group that is contiguous with economically dominant within any context in which it finds itself. This is why different ethnic groups and individuals move in and out of 'whiteness' as the economic paradigm requires. We are seeing this now as second and third generation children of South and central American immigrants are beginning to move into "whiteness." Yes whiteness does, generally, have some phenotypes and behaviors associated with it, but they are loose and contingent on the necessity if maintaining the white supremacist racial hierarchy, not some communal self understanding and organic development of a social group.

For example I am a white trans woman and an athiest from upstate new York. I have very little in common with a white cisgender christian man from east Texas. From an ethnic perspective I have more in common with a black trans woman in the same town as me. The one thing that binds me with the white dude in Texas is the relative dominance we have economically in society as "white" people. As a socialist I want to see the end of that dominance hierarchy.