Any action taken by Israel or America,singularly or jointly, against Iran will see Israel as the ultimate loser. It will start a backlash by the majority of Arab States against Israel. Something Israel, regardless of its self percieved invincibility, will not survive and America will not be able to stop. Clinton said as much to Israel.
Netanyahu condemns West Bank arson attack, calling it 'terror' (Haaretz)
from the article: U.S. has pinpoint attack ready on Iran, says Israeli official