Here’s the thing. Given that any nuclear weapons that they develop will not save them from being nuked in return for any attempt to use them, by far superior forces and that their nation will not survive, the Iranians would have to be completely loopy to even consider it.
The evidence is that they like making a lot of threatening noises, but (as with the threats to close the Straits), when confronted by superior firepower, they back down.
They are a bunch of nasty torturers and anti-democrats, sure. But we know that already, right?
India and Pakistan are enemies. They both developed nuclear weapons, but neither have used that option. The obvious outcome of that useage has prevented it.
Once again, it’s the oil. Of course.
There’s nowt to worry about. For the moment…