He doesn’t seem to understand that Iran doesn’t want a nuke to use as a threat. Iran wants a nuke to use.
I would be very surprised if they are not already assembled into warheads.
The only thing holding them off is that they will probably want to have enough to actually make a huge impact, and pre-position their attacking entities for the deployments in the West.
When all their ducks are in a row...then they pull the trigger.