Israelis already know that Jews are not welcome in Arab or countries of Muslim states. They know that even if, G-d forbid, you destroyed Israel it would not be enough to satisfy Islamic blood lust. You would then go hunting after Jews all over the world. History has seen what terror Islam and Arabs can bring to the world and to Jews in particular.
Ex-FM Lieberman: Firebomb attack in Jerusalem a reminder that norm is Arab terror against Jews (Haar