What Israel expects Iran will do after receiving and attack(that i supposed it would be swift and simultaneous in a short time)? What if Iran does nothing to an attack but instead begins to rebuild their nuke program retreating from the IAEA? Israel image in the world would suffer greatly and Nobody, neither the US, will support Israel in that outcome and Iran will have nukes finally(We don't know if they want to build the bomb or only retain the ability to make it in short time). What if Iran retaliates with Hezbollah, Syria and Hamas? In this case i expect a brutal war because hizbullah will shoot everything it has,and Syria and Iran would do the same and the israeli retaliation could be very big. And the response to that could be a nightmare for the region.
5 wounded Syrians rushed to northern Israeli hospital (Haaretz)
from the article: Deputy PM: Time is now for action on Iran nukes