Liberals often shake their heads at Conservatives and deplore our inability to grasp their “nuanced” arguments.
But what their argument usually comes down to is: racism.
Or sexism, or "abelism," etc.
Can anyone really argue with a liberal? My experience -- he (often she) will either get hysterical and make ad hominem attacks or literally run out of the room (as had happened to me). Once someone Facebooked me: "I'm not going to argue with a religious fundamentalist!" Even though the issue (& my comment) had nothing to do with religion.