Racist people can likewise fanboy over black musicians and also be racist towards average black people and even towards their faves.
Humans don't make sense sometimes.
There's people that made their political alignment their identity. Like there's people who make their disability or their gender their identity. The takeaway from all this drama is that nowadays many are confused and are looking for a sense of belonging which has eroded over the past century or so as a result of long distance migrations and urbanisation.
Ah yes I am familiar with racism within mixed families.
They feel good when in a crowd of seemingly like-minded folks and collectively hating on a common enemy aka scapegoat releases more endorphins than to have a good life.