The reality is simple: every country struggles with madmen and ideologues with guns, and every country—Canada, Norway, Britain—has had a gun massacre once, or twice. Then people act to stop them, and they do—as over the past few years has happened in Australia. Only in America are gun massacres of this kind routine, expectable, and certain to continue. Does anyone even remember any longer last July’s gun massacre, those birthday-party killings in Texas, when an estranged husband murdered his wife and most of her family, leaving six dead?