In a new TV commercial, Mitt Romney utters one of television’s new forbidden words. “It’s this century’s nightmare: jihadism. Violent, radical Islamic fundamentalism,” he says. “Their goal is to unite the world under a single Jihadist caliphate. To do that, they must collapse freedom-loving nations like us.” The forbidden word? Jihadism. Romney says in the commercial that in response to this threat he’ll beef up America’s intelligence services, monitor Al-Qaeda’s calls into the U.S. (a clear reference to a controversial Patriot Act provision), strengthen the armed forces, and stop Iran’s quest for nuclear weapons. None of these recommendations, however, are...