The other day, George Jonas passed on to his readers a characteristically shrewd observation gleaned from the late poet George Faludy: “No one likes to think of himself as a coward,” wrote Jonas. “People prefer to think they end up yielding to what the terrorists demand, not because it’s safer or more convenient, but because it’s the right thing . . . Successful terrorism persuades the terrorized that if they do terror’s bidding, it’s not because they’re terrified but because they’re socially concerned.” This is true. Resisting terror is exhausting. It’s easier to appease it, but, for the sake of your self-esteem, you have...