"Another advantage for N. Korea is China. If the US starts a ground war (or any kind of war) with Korea, China is going to get involved, and, wit over a billion people, they are definitely a formidable adversary. "

In last Korean war the Chinese entry was provoked if your General McArthur hadn't pissed the Chinese
off when they warned him repeatedly not to come closer they might have not have sent there troops screaming across the border like a swarm of locusts there were thousands of them.