Quote Originally Posted by Alexander the Pretty Good
Most of those countries aren't healthy democracies, huh?

And I getting specific, I could see a nuclear Iran giving materials for a dirty bomb to Hezbollah or some other terrorist organization. If the bombers were good, Israel couldn't even be sure Iran gave them the goods. Net effect: Iran achieves a nuclear strike without much chance at retaliation. Thousands or millions of Israelis die.
Low chance of Iran giving them to terrorists, as material is used, gets traced back to Tehran, Tehran gets turned to glass. Former Soviet states are under the protection of Russia, so they are immune to the US, while depending on the situation North Korea is similarly under the protection of China. If Iran produces nukes, one can be sure they'll keep a mighty close eye on them, since they know everyone else will.

Look at the balance between risks and benefits. The most powerful country in the world is already looking for excuses to bomb Iran, up to and including using nukes. Iran will be looking to keep its rep clean when it comes to the ultimate weapons. If they produce their own nukes, they won't use them unless the US or Israel pre-emptively nukes them, or carry out a ground invasion. They certainly wouldn't give them to outsiders for a spiteful attack on Israel - far too great a risk and cost for far too little benefit.