Last week, 40 United Nations ambassadors on a trip to Poland to become witnesses to the Holocaust, and then to Israel to experience the miracle of the reborn nation-state of the Jewish people. As the Holocaust recedes into the past, the world is witnessing a resurgence of anti-Semitism. Most Western leaders condemn this bigotry when it targets diaspora Jews. But too often they disregard, dismiss or even justify Jew-hatred when it targets Jews in their national homeland, Israel. This willful neglect of anti-Semitism against Israeli Jews poses the greatest danger to diaspora Jews, since it legitimizes anti-Semitism everywhere.