I was prompted to talk about this based on a thread over at Bells On. Hold on tight, because it's going to be provocative.
As to the threat of North Korea and Iran having nuclear weapons, I say they have every right to have them. Here's why:
We have them.
Let me break it down for you. Both of these countries are sovereign nations, correct? And, for better or for worse, these countries have leaders. We may not like them, but they exist. If you are the leader of a sovereign nation and another country (us) that has nukes is speaking very threateningly towards you, isn't it your responsibility as the leader to do something to deter that threat in order to protect your constituents? The only deterrent to a nuclear weapon that I can think of is another nuclear weapon. Like it or not, these leaders are only acting in the interest of their nations. You see, nuclear weapons do not discriminate between military and civilian, between leaders and their people, when it comes to killing.
Now, you'll say that these countries are just going to give this technology or the actual weaponry to the terrorists or, in Iran's case, they'll use them to destroy Israel. I ask you, is that in their nation's best interest? Don't you think they realize that would result in their complete annihilation? I suspect they are aware.
The fact is, nobody needs nukes. There should be none. They kill without prejudice on a massive scale. As the computer in "War Games" aptly put it in regards to nuclear war, "The only move is not to play."