A nuke is a nuke weather it is the size of the ones that hit Japan or the size of a small marble it will do some damage You don’t want to be around when it goes off.
You are right about that, and, where there is a small nuke, there is likely to be a large one, in my opinion. NK is very dangerous, the country is not prospering, and that alone makes them dangerous. We need to remember that human life is not held in high value in a lot of countries that are our potential enemies,or we will be rudely reminded of that fact one day.