There are some serious misconceptions in here...
First of all North Korea is not a communist country. It is impossible for a real communist country to have a authoritarian figurehead. If you don't know what I am talking about read the actual communist manifesto instead of swallowing some haggard definition from the 60's when it was a fashionably aligning term. Hell it still is today. I'm not arguing for the implementation of communism in any way, just clarifying since someone said they sympathize with China because they are communist.
Also, this is just a media's wet dream for the most part. Even though there is some element of drama to it, it is quite evident that neither side wants an all out war. The South doesn't want its economy and infrastructure that they have prided themselves on destroyed and the North Korean people are extremely malnourished. Even though they have a million man army, they do not have the supplies for an extensive war...they know this. This is simply North Korea's way of staying aggressive and trying to maintain their footing as a regional power. They are still extremely upset (almost rightfully so) at the actions taken against them during the 1950's and this is where their hatred of the US stems from.
So before you make any ridiculous assertions like have been made in this thread I urge you to read something about the Korean war and its aftermath. Stop swallowing the axis of evil condemnation and realize that the world is not a movie. The world isn't "good" and "evil".