Perhaps if the United States policy towards countries developing nuclear weapons was based on "What you do" not "Who you are" there would be less interest on the part of Iran on developing them.

Israel developed them without sanctions from the west. Why would Iran think that if they gave up their nuclear program Western countries would stop supporting aggression against it?

Perhaps having gone to college with Iranians who fled the repression under the Shah allows me understand Iranians mistrust of the United States.