Nothing left to deter Iran form completely it’s efforts to have nukes.... except Israel.
Israel bombs Iran .... Iran responds militarily, maybe with dirty nuke bombs ... full blown war erupts ... Israel is made out to be bad guy and Obama leads world against Israel. Where have I read about this before?
Israel can’t hit Iran. Iraq would not let them overfly, and our own forces would be told to engage them.
Saud has expressed interest in letting Israeli jets refuel in the Kingdom, but if they do that the King might face a lot of internal pressure. Still, they are taking a more active role now.
More than likely you will see Saud buying their own nukes, and Israel going open as a nuclear power.