I want to ask you two questions:
(1) If a much stronger nation told a much weaker America that if we didn't scrap our entire bomb-making infrastructure, they'd bomb us and maybe even invade us, what do you think we'd do. Do you think we'd knuckle under, or would we redouble our efforts to build bombs?
(2) Considering your answer to the previous question, what the hell makes you think that the Iranians would react any differently?
This is why we do things like use REAL diplomacy - which, if you knew half as much as you think you do about diplomacy, is not the panty-waisted appeasement process you seem to think. There's a reason why diplomacy is often called "the velvet glove that covers the mail'd fist". Think about it.