Mormons, that's who!
Read this article. I find it true and sad. Mostly sad. I stole the link from m&m. I do that a lot, it seems. :)
Oh, and for what it's worth, I think the reason it's okay to throw bigotry towards those of the LDS faith has a lot to do with our passiveness. We are fairly peaceful, you know?
P.S. PC means "politically correct" (this is for my "seasoned" readers).