After the Israeli Prime Minister's recent gaffe in admitting publicly the existence of Israel Nuclear arsenal, (200 warheads at the last count) Iran has written to the UN Security Council compeling it to make Israel disarm and to accede to the Nuclear Non-Profileration Treaty.
Israel should have nothing to fear from a nuclear attack by Iran. The USA with its missile defence system would just put interceptor missiles on Israel's soil. Just as they put patriot missiles there to protect them from scud missiles from Iraq.