The north korean population is poor and hungry, but they have no access to external media and won't be easy for the cia to influence. there is no evidence that KJI is about to fall. They will probably actually fight.
As utterly and totally strange as it may sound to us, the North Korean people actually appears to love Kim Jong-Il. They have no better source of information than their own propaganda, and they're told to blame their nation's problems on sanctions imposed by the USA and British.
A war with North Korea's as totally out of the question as a war with the USSR was during the Cuban missile crisis. North Korea has one Hell of an army despite their country being a Hell to live in.