There is a whole generation of brainwashed people in North Korea and there is an idiot in charge who will soon get nuclear weapons. Lets hope he doesn't want to try global domination before his death.
China wants to keep North Korea around. So it stays. The US and NATO are full of gob, while losing their wars with Afghan peasants. They are not keen on going up against real soldiers defending yet-another worthless place like north Korea. Nor should they be, IMO.