Israel NEVER wanted war and will not intervene when arabs kill each other using chemicals (Iran-Iraq War). It is not likely they will respond to such attack as it does not threaten Israel directly. As far as defense, they gave the terrorists CRUCIAL Israeli territory that allows daily short range rockets to attack any major city in Israel. Security from missile attack under the 'Iron Dome' is adequate but hardly 100%. Watch videos of rockets landing in Haifa.