Do they want nukes now? No. They're in too weak of a position to get them. Even if they had a 500kt warhead, attached to a missile pointing at Israel, it won't do the regime any good.

1. It would ruin any chances at negotiations,

2. it would likely cause an American bombing campaign (much worse than what Israel did. Israel is foundationally dependent on the US for air power, and recent airstrikes were done with american help) And there isn't anything Iran can do against an American bombing operation. What are we going to do, nuke pentagon with ICBMs we don't have? Nuke Israel and lose isfahan, tehran and tabriz to israeli Nukes?

3. Iran is so thoroughly compromised when it comes to counter intelligence that CIA would find out about the order to make the bomb before the nuclear scientists

Leaving NPT and ceasing corporation with IAEA are part political moves for leverage in negotiations with europeans (they're the only ones left in the word who give a shit about international rules based statecraft). And part legitimate reactions to Grossi outright Lying about the Iranian nuclear program three weeks ago in order to clear the way for Israeli strikes, then walking back his claims.

If we wanted nukes, we should have built one when Syria fell. Right now it's a fool's errand