There was never any doubt about developing a nuclear weapon within Iran. You don't enrich to beyond 60% in a secretive bomb-proof bunker with any other goal in mind. This "oh now we've convinced them to build a bomb" line is nonsense.
They began enriching to 60% as a response to Israeli attacks on the country in 2021. Before that it was never higher than 20%. 60% is just below weapons grade and was meant to send a message. Similarly, the reasons their nuclear program is completely underground should be completely obvious at this point. Israel has been trying to get somebody to invade them for decades, has been assassinating anybody they can find, and so on.
Before this there was every reason to doubt Israel's claims, which they've been making for 30 years, about Iran imminently having a nuclear weapon. But at this point there's a practically 100% certainty that they will be aiming to create nuclear weapons as quickly as possible.
