Wrong, it’s not SK’s problem. This guy is developing delivery systems which can reach anywhere including the U.S. That makes it our problem.
It all comes down to the same exact problem we have with all Nuclear nations that have ICBM’s that can reach the US.
Mutually Assured Destruction.
If he launches a nuclear tipped ICBM, we will know its trajectory, therefore its target, it will then be shot down, but they will not be able to shoot ours down.
Kim knows if he launches hes dead, and all of his people are dead too.
If he sells a nuclear weapon to a terrorist group and they detonate it , the radioactive particles will be quickly traced back to whatever NK reactor the material was refined at, and once again NK turns into a glass parking lot.