Last week on the day of International Holocaust Remembrance Day, as the memory of those lost in the Holocaust was commemorated around the world, a lone gunman shot eight Israelis from his car window. The innocent victims were killed walking peacefully toward their neighborhood synagogue in Jerusalem. Israel plunged into mourning while fresh attacks drew blood in both Jerusalem and other cities. These types of heinous terrorist attacks are new. The modus operandi is different. The lack of organizational ties is also new. In each of the recent attacks, different suspects, who were killed in shootouts with security services after...