I've noticed the word "racism" thrown around the Harry Potter fandom, which isn't really accurate. Prejudice is prejudice, whether it has to do with religion, race, nationality, sex, or age. It's just because the discrimination expressed in Harry Potter doesn't exist in our world, we don't have a word for it. There's no racial problems ever mentioned in the series. Harry likes a Chinese girl and goes on a date with an Indian girl, Lee Jordan's and Dean Thomas' best friends are white, and there's at least once black kid I can think of off the top of my head who's in Sytherin. It's about who has the old blood and who doesn't. That has nothing to do with race. People like Voldemort don't give a shit if you're Middle Eastern, white, or Native American, so long as your family's been magical for generations without touching those non-magical barbarians. I guess we could say "Mugglebornism," although that sounds terrible. "Magicism?"