Why would any white person vote for a party that hates them for no reason other than their race?
Virtue signaling.
The discussion on white privilege turns to a discussion on white fragility if you question, "Why isn't judging a person based on their whiteness racism?" When you bring up the definition of racism, "a belief that race is the primary determinant of human traits and capacities and that racial differences produce an inherent superiority of a particular race". They start spouting about systemic racism which inevitably leads back to your (white) privilege and fragility.
Just tell them that their accusation is a baseless claim unless they can scientifically prove it. They can't. They'll get all huffy and try pointing to some gender studies style paper which would get a failing grade in even the entry levels of respected areas of scientific research.
Why would any white person vote for a party that hates them for no reason other than their race?