They have been planning WW3 and depopulation for some time.
Your scenario is pretty convoluted. The US, China, Russia, Japan, and even South Korea have way too much to loose to want a war of any kind on the Korean peninsula. The North Korean leadership is insane, and they are acting out.
However, they don’t really want a war either. The real danger is that they might push things to far someday.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.