Lack of racial consciousness. You can't hate something you don't identify as real.

When a white liberal laughs and disparages another white person they don't see it as self hate. They just see a 'bigot' or a 'conservative' not another human being. When they see this person they've made moral judgement on them. Christians, conservatives, Trump supporters and other right wingers are all morally evil to liberals and morally evil people are fair game for their ridicule and persecution. To liberals whites are not one team fighting against the outside world. In a liberals brain they are the heroic defenders of oppressed groups. They are living a movie script in their minds. They are being the 'good' white person. They are assuaging a false guilt implanted at a young age. They are evil, they are responsible for all the wrong in the world, and the only way they can feel any relief from this anguish is daily penance. Wokeness is the new white religion and we are in the grips of what can only be described as a liberal moral panic.