Anything is possible. Even if, for the time being, it is just a verbal escalation, there is no guarantee that a nuclear war will not break out between the United States and North Korea.
An appeal for the eradication of weapons of mass destruction is easy and yet promises nothing, particularly when such a plea comes from a potential nuclear arms proliferator that isn’t ready to make the gesture that would convince us of its good faith, namely by reducing an arsenal capable of destroying the planet 100 times over.