The main argument against building the Park51 (Ground Zero) mosque adjacent to Ground Zero has been that its placement would be a lasting affront to the memory of the Americans who died at the hands of Muslim terrorists. And that argument is certainly sufficient by itself. But it is not the most important argument against a mosque in that location. To understand what is, we must remember what happened the last time we fought against suicide bombers, who, like their contemporary Muslim counterparts, were inspired by what they felt to be a divine mission. In the Second World War, Japanese...