Israel knows they have the US by the balls.
Iran has enough missiles to wreck havoc on tiny Israel. It's only the threat of retaliation by the USA that holds Iran back.
No other country would retaliate against Iran on Israels behalf.
And to make it even more idiotic, Israel really doesn't have bunker busters that are 2x better than the best the USA has. So they can't actually destroy any significant part of Iran's nuclear facilities.
So it would just be an empty show of force that would force the Iranian regime to retaliate to save face, which then lures in the USA into yet another war in the Middle-east.
I hope Americans are ready to throw another $10T into yet another MENA war.