I've come to believe that people like this aren't actually racist against white people. They're simply hateful monsters who will hate whoever they're allowed to hate. Had they been born 200 years ago, they'd be lynching blacks for fun. Had they been born in imperial Japan, they'd be raping Chinese farmers just for a laugh.

White people are simply the race that the establishment allows hatred against at the moment. Path of least resistance and all that. If you don't care who you hate, it makes sense to channel that hate into a soft target.