Generalizing white people is based off of their extreme position of power, their privileges, and their benefits; it has nothing to do with their skin color or anything to do with their appearance. This is about power not appearance. And while prejudices can be formed for any reason about any group the reason it is not prejudice to generalize white people is because they are the oppressive power. It is just my opinion, because when I think of prejudice I associate it with attempting to dehumanizing a group of people for whatever reason. Addressing and dismantling an oppressive group is not the same as dehumanizing them.