I’ve heard people say that if someone is brought up in a sexist society and thus becomes sexist, it’s not their fault. That’s a bit of rhetorical sleight-of-hand. On the surface, it’s true – but it sidesteps the question of continuing responsibility. If the same sexist (or racist, or whatever) person is capable of re-evaluating their own position but does not do so, then they’re responsible. Perhaps not for becoming prejudiced, but for remaining so.