Would the kimchee hit the fan if the NK's lit one off?
The rulers of NK are insane. Most of the population is close to starving and they waste money on a-bombs and other weapons.
We don't want to invade NK and S. Korea doesn't want to invade the North, so why rationally does NK build these weapons?
We already under Clintoon offered NK food and energy, and NK cheats and broke the agreements. The country is run by insane people. That's a good reason to neutralize them before they use those bombs on the South or US.
Japan and Taiwan will test them in short order after that...