The fantasy that they've not used nuclear weapons because they've not got the means to deliver them. They've not had long range missiles capable of reaching mainland US, but there's plenty of other means available.
I'm sorry I didn't realise responding to the point you'd just made constituted a cryptic comment. I'll try to bear in mind that in mind next time.
Responding to what I said in a way that I cannot know what you are referring to is a cryptic comment, is it not?
It is doubtful that North Korea could even now place a miniature nuclear bomb on a missile and deliver it to the US mainland, but their capability now is certainly superior to their capability in past years because they have been working hard to develop the means. Therefore, the fact that they have not bombed us yet doesn't prove, as you suggest, that they wouldn't do so if they had a well developed ability to do so.
Your apparent suggestion that we should let someone like Kim Jong-Un develop the means to kill millions of us and do nothing to stop it is nonsense. And if you dare to compare Kim Jong-Un to Donald Trfump, I will enumerate the blatantly obvious differences. Here's a preview: Donald Trump doesn't execute people who show the tiniest disloyalty.