This is not a joke, he really said it:

[Liberals] don't understand their own moral system or the other guy's, they don't know what's at stake, they don't know about framing, they don't know about metaphors, they don't understand the extent to which emotion is rational, they don't understand how vital emotion is, they try to hide their emotion. They do everything wrong because they're miseducated. And they're proud of that miseducation. Oxford philosophy reigns supreme, right? Oxford philosophy is killing the world.