Let's assume Iranians are good at strategy, very paranoid, and more than a little nuts ( leaders willing to let their citizen go to Allah - while they leave the country and sit this one out in UAE...)
Here's a nightmare scenario - 5 nukes go off in Israel - destroying the country. Some of the nukes are "in place" some are dropped by small planes that are not identified with a country. After the nukes go off - Iran states it wasn't them... and sure enough - it looks like the bombs might have been bought from the Russian mob or North Korea or even China - blackmarket stuff...
Israel can't retaliate - they're finished. We hold off because we don't know where the nukes came from... With Obama and liberals in charge - the liberal establishment bends over backwards to make sure not to go after Muslims without massive proof - ( NOT PC). Besides, it might have been the Amish after all- must investigate...
In the mean time Iran is making the case that Israel is dead anyhow - so there's no hurry to the investigation - then later - even if it was them - the "issue" no longer exists... ( Israel's existence being in their mind 'the issue')
Iran needs to be told in no uncertain terms that if the above happens, they will be bombed because we know they're nuts... ( or something like that - only a little more diplomatic)
At least a good fraction of Israel’s nukes would survive intact.Then the Masada complex would come into play.
Skipping the zero factor, why wait?
“Besides, it might have been the Amish after all- must investigate...”
The Amish shun technology.
Watch out for the Mennonites.