North Korea is simply a insane party for psychopaths, to play with a population to feed the egos of those at the top, something psychopaths all over the world are trying to achieve, whether they are the ones running NATO or US corporations, or terrorist armies, same shit all over the world. Why is the stalemate allowed to occur so publicly in North Korea because it is not worth any countries efforts to deal with it, in any meaningful manner.
Like terrorist armies, the psychopaths pretending to be on our side, like to keep the fear factor going so they can exploit it. So for the terrorist armies, stopping fucking naming them, stop giving them an identity to exploit, they are organised crime gangs and should only be named after their gang lords. This so that anyone joining them knows they are just going to be a gullible idiot enslaving themselves to some egoistic psychopathic freak, so the freak can enrich themselves and feed their ego on the blood of others, no lies of hiding behind religion, those freaks believe in nothing but themselves (this doesn't happen on purpose because our psychopaths want to feed the greed of the military industrial complex, they want to war to keep going for decades to come, they have publicly stated so, decades of terrorist war).
Just the same as North Korea, they do not want it to end, they are pumping the nuclear fear for all the billions in arms sales that it is worth, striving to keep it going and never let it end. Want it to end, simply cut North Korea off from everything and dump it is a problem on China, a constant economic drain an endless source of problems. Don't let them out, don't give them anything, don't supply anything and do not feed into their troll bullshit. They are trapped, do anything too aggressive and their insane psychopath party at the expense of the trapped population ends and so do they (if that trapped population are unwilling to free themselves, then convince them to choose between die trying to free themselves or die a slave, they did so once before, they can do so again). North Korea is trapped in inaction and we can be freed by that exact same inaction. Bar their ships from any port, deny them all trade, inform their population, remind them of what they once achieved and can achieve again. Once North Korea becomes a sufficient problem for China, North Korea trapped with no where else to go, will be a problem solved by China (when it is worth more to China to end the problem rather than just largely ignore it, they will). Stop pandering to North Korea, if they do anything stupid target the chain of command, any escalation and they know the result. They are a totally paranoid government, feed them mass misinformation about betrayal in their own ranks, feed their fears, let their own fears consume them but do not be stupidly drawn into the same trap.