After Israel’s dizzying victory in the 1967 Six-Day War, everyone hummed “Yerushalayim shel Zahav” and “Ha’olam Kulam Negdaynu” (“The Whole World Is Against Us”). It was a kind of defiance of the pessimistic Israeli leaders at the time, who had thought we were on the brink of destruction until within six days we ruined Egypt’s, Jordan’s and Syria’s...