Why on earth should they? The only value of atom bombs for Iran would be as a deterrent, and if they used them they'd hav've blown it. Israel is estimated to have about 200 nuclear weapons.

The regime in Iran has never gone in for that suicide stuff. However "fundamentalist" it may be - whatever that word means by now -the regime has generally acted in a fairly conventional seeking-to-protect-national-interests way in international affairs.