I find it hard to believe they're dumb enough to actually provoke a full fledged war.
I mean are they actually that delusional to believe they have a military power that can compete with SK? Also, why did they bother to break the cease fire? It didn't stop them from flinging a few shells over the border to that south korean island a couple years ago that killed a couple people. It sounds like a bluff to me, and most likely political puppetry. They have a history of stirring the pot and using a bunch un-backed threats to squeeze humanitarian aid out of countries. Clearly they proved they have no problem with not playing by the rules and taking cheap shots so why bother, seems like they're just pushing buttons.