No, I don't think that.
> Nobody wants an unstable, belligerent, nasty dictatorship to have the ability to nuke other countries.
The US opened this can of worms and created an imbalance in the world. North Korea is surrounded by nuclear enabled countries (China, Russia, South Korea, and Japan).
As an aside:
What exactly is 'unstable' about North Korea... it's been the same ruling family for 50 years... I realise propaganda has permeated all of our views and it's difficult to see through the fog of misinformation but think about the words you use as you write them.
North Korea (from all credible reports) is a mess, and quite horrible for A LOT of people, THAT needs to change. I would not rate it any more "belligerent" than the US. It is definitely not unstable and its Nastiness extends only as far as its borders...