The explosion of anti-Jewish violence by many Israeli Arabs in identification with Hamas, at a time when the Islamist terror organization is raining hundreds of missiles on their country’s population centers, necessitates the abandonment of Israel’s policy of inclusion that has served it well in recent years and the redrawing of the boundaries of what is permitted—and particularly of what is forbidden—in its relations with its Arab citizens, and all the more so with Hamas and the Gaza population.