Of all the unstable nations that we tolerate with nuclear weapons, NK is the one we don't want with them. They are amongst the most criminally-inclined, reckless, and vicious people on the planet.
They would cheerfully let off a nuclear weapon on any one of a dozen of their hated "adversaries", even if it meant serious destruction of their own country.
You mean the leadership, not 'the people' I presume.
You must have trouble sleeping at night carrying all that worry around with you.
Fear not. NK will do no such thing. MAD still applies.