Its simple if Iran's president or whatever the position is over there didnt come out with mad ass statements against the west and labelling america the great satan and all that crap they could probably have gotten away with arming themshelves with nukes....But lets get realistic here folks anyone who has nukes has them as deterrents its what all that bickering is about in europe of a missile shield is about....The possibility of losing deterrent status by america rendering strike capability void which is impossible anyway just send more nukes lol.
Iran are nervous I would be two america has invaded there neighbour, saudi arabia dislikes Iran(this could be a understatement_ and Israel could go to war with them at any time. They just want to defend themshelves as guy said there beforehand. I seriously doubt they want to actually nuke anyone no country or leader does because they are all aware of the consequences...MAD- mutually assured destruction.
Personally I would be more worried about North Korea, the power vacuum that will occur there when good old kim dies....Thats one volatile state, who are still at a defacto state of war with south korea. I dont think there was any treaty signed there, the border is basically temporary any kind of hardliner could take up the reins there and be a even bigger threat. Worse what relationship the west has with kim jong most likely wouldnt be present with mr X.