It occurs to me that being politically correct means being humorless, and since humor is a primary means by which people moderate and deal with their differences, this means that structurally it amounts to a holding tank for the accumulation of anger.
Witness Jon Stewart. His “humor” is mean-spirited, and consists nearly entirely in mockery, in portraying people as buffoons and cartoons. His humor is not meant to build, but to burn. There are grades of humor, and his is that of witty insult.
Stewart, a Jew, is only one step away from what the Nazis did in their caricatures of Jews. I mean that sincerely. I cannot watch him without feeling a strong undercurrent of very unfunny contempt, and latent violence.