The Iranians have constantly and repeated told everybody that they have no intention of building nuclear weapons, and in fact the leader they just assassinated issued public instructions to the country stating that they were forbidden to try. And they always submitted to IAEA inspections on their nuclear facilities and before the Us/Israel kicked off, were sat in Vienna about to sign a document that gave even more access to nuclear inspectors and included the words that Iran would "never ever" attempt to build a nuclear weapon.
The nuke angle is complete bollocks. Frankly, if Iran had nuclear weapons then Israel would have been glassed already. They're in a total war against a country they see as their mortal enemies and they've just killed their religious leader and a number of their political leaders.