Regarding NK,
I agree that it has always been the intent of Kim to acquire nukes, however consider his change in behavior since the "Axis" speech.
We know he had a program in place, but there is every indication that since then he has accelerated it dramatically. He is also redoubling efforts to develop or purchase technology that would greatly expand the ability to launch ICBMs with the capability to strike ever deeper in to US territory.
This increase in posturing is also new. Not that he hasnt done something to a much smaller degree, but I do not recall him actively pursuing a policy that openly challenges the international community and us in particular to this degree.
What I do believe is that an unstable Kim has been pushed further over the edge. This man worries me. Saddam did not, at least from an international perspective. While Saddam postured, I believe that was an attempt to make himself more dangerous that he really wanted to be. He did want power, but that was more over his own people. Saddam valued his personal security above all, and saying over and over again that he was going to nuke Israel, and demonstrated the ability to do so would have resulted in his death. That he wanted to avoid, but his posturing backfired and IMO was read incorrectly by an administration all too glad to do so. Now, Kim is not just sadistic, I believe he is unbalanced.
In any case, now or later, Kim would have nukes (best intel suggests he had some before all this started) but not the seeming propensity to use them.
Regarding Iran, SA and other countries... for all their problems, the construction of nukes did not seem something likely to have happened, but the current insecurity of governments could reverse that.
Remember that the primary function of any government is to keep itself in power. Anything else is secondary. It would seem at first that being obedient would best guarantee that, however when a people feel their way of life is threatened, they may choose less constructive (read more deadly) means to retain control. A government who must obey is someone elses govt.