My brain is trying to parse the concept of "heroic racism", but all I'm getting is a Klansman fighting a dragon.

What I mean is racial "us and them" mentality where the hero leads his people to triumph over the other race, who are obviously all evil.

If "jews" were to be in fantasy, I could actually see them as being more of a main character than some race in the background. Perhaps most authors just choose less original reasons for a hero to be downtrodden at birth than religious ones.