Because these "right-on" Liberal Dims think that Conservatives are inherently racist, bigoted and chauvinistic.For them anyone of colour or victim class who sides with the right-wing is a traitor to their identity.It's their absurdity of liberal politics where they have to fit into little boxes.If you're black or Hispanic you're supposed to be a liberal.If you're black you can't believe in free markets.If you're a woman you can't be anti-abortion.The Lib Dims live in their own little bubble, outsiders are automatically derided by them.
