I am sure the Iranians would be able to dig out pretty quick. If the centrifuges are not destroyed (and the scientists and technicians killed), the raid is a waste of time, money, and political capital.
If’n I were the Israels... I would suss out the area around the refineries. I’m bettin’ the scientists and techies don’t live underground. If you don’t mind the collateral damage that might as much damage as hitting the fortified production facility.
Alternately, if the Israels really DO have support from the Saudis they might try an audacious commando operation in combination with the airstrike.
The scary part is the aftermath. Such an attack is pretty much a declaration of war against Iran. How will it follow up?
Has the US been at war with Iran since the embassy debacle?
Has Israel been at war with Iran since Stuxnet?
Does "Death to America" "Death to Israel" repeated thousands of times constitute a "declaration of war?"
My point is that Israel and the US have been at war with Iran for a long time. Where the continued conflict goes from here is the big question.
Obviously I am not privy to the thoughts of the Israeli and American leadership, but, Israel must think that Obama is leading the US to switching sides. This "agreement" is absolute rubbish and contains a clause which commits the US to defend Iran's nuclear industry. How is that going to work if and when Israel attacks?