I'd personally say that Nantez isnt as protected as the Iranians think. Anyone who has worked with gyros knows how sensitive they are. A small earthquake would completely destroy the servicability of every installed centrifuge. It doesnt really matter how many SAM's they have protecting it. Those and the radar stations are the first to go with sub and destroyer launched stealth cruise missiles.
It's my opinion that a country that threatens a neighbor with destruction and uses terrorist organizations to fight their war cannot be allowed to obtain enriched nuclear material of any kind.