Iran will produce 25-50 nuclear weapons and put them in ballistic missiles, to give itself a retaliation capability sufficient to deter Israel. Then it will give 3-5 nukes to its terrorist proxies, Hezbollah and Hamas. The terrorist proxies will then nuke Israel.
Quite straightforward, really. Iran calculates that Israel will not risk 50 more nuclear attacks just to get revenge on a distant sponsor. They might be wrong or they might be right, but that is their calculation. Considering how spineless every western government is these days, and half of the Israeli populace, it is probably a fair guess.
This is so obvious the only wonder is why men everywhere continue to pretend otherwise, and invent scores of new competing excuses for Iranian tyrants. The Iranian tyrants themselves have been entirely straightforward about it throughout. It is plain as a pikestaff. But men will invent anything rather than face the simple fact.
Putting a nuclear weapon in a missile and then getting it to work is another kettle of fish beyond anything they have attempted yet. Putting one in a truck might be doable but the missile thing isn’t going down any time soon unless somebody shows them how.