Thank you for admitting that the world sees Iran's nuclear program as a thinly veiled attempt at nuclear weapons.
Didn't you get the whole "trust but verify" memo? Of course the west is suspicious. But the cold hard facts are, once you master the nuclear fuel cycle, then building a fission bomb is not that hard. Heck, if someone gave me a chunk of HE uranium and internet access I might be able to build one. Many, many countries have the capability to build a nuclear bomb. Let me list some of them for you:
Canada, Mexico, Brazil, S. Africa, Japan, S. Korea, Taiwan, Singapore, Australia, NZ, Ukraine, several Stans, most western European nations, Turkey, Poland, Czech Republic, Solvenia, Bulgaria, Hungary etc etc etc etc....