All heroic characters share one trait: they’re willing to put something vital to humanity as a whole ahead of themselves.
It’s one thing to think really highly – perhaps even too highly – of yourself and to be self-centered. But it’s quite another to view others with disdain or even contempt because, after all, they’re just not you. A pathological degree of grandiosity (i.e. malignant narcissism) is always at the root of bigotry.