does Iran have a nuclear program? Without a doubt, they have admitted as much. The IAEA monitors their known facilities 24/7. Satellite monitoring would detect any concentration of highly enriched uranium. Are they trying to develop a nuclear weapon? All reasonable intelligence says no. Not since 2003.
Would it even matter if they were developing nuclear weapons? To me it wouldn't matter and I think the rest of the world should consider it just a minor irritation.
Ask yourself two simple questions. One might require some research, the other some logical reasoning.
When in history has ever taken aggressive action against another nation?
If they developed and used a nuclear weapon, what would be the response of the rest of the world?
Here's my answer to those two simple questions.
In over two thousand years Persia (aka Iran) has never taken aggressive action against another territory.
Should Iran use a nuclear weapon against another state without provocation they would be obliterated. They are not foolish enough or suicidal to let that happen.

It's time we learned that it's much better to quit pissing in other peoples sandbox and share our toys.