Cause they don't believe in democracy. They are whining little bitches who believe they are the new civil rights movement. They transcend the people's will.
Not only that, but they really showed their true colors when they dared to expand their agenda and started indoctrinating children in public schools as early as kindergarten. IMHO, this may have been what prompted more people to vote in favor of Prop.8 And any black-robed party hack that tries to overturn the peoples' vote again ought to be removed.......fast.