Little fat boy is making noise because the economic sanctions that Trump placed on NK are squeezing him and isolating him from China’s help.
When a leader simultaneously personifies Little Boy and Fat Man, of course things are going to go nuclear. But if we put enough pressure on China, we can put a chink in his armour.
N.Korea cannot match the US militarily or economically, it can only fight us with words. In that, they actually have an advantage because we consider them unpredictable and possibly capable of doing something suicidal, like nuking Guam. They, OTOH, know from decades of US foreign policy that we are only likely to fight with words. My conclusion is that they are wholly rational because they are chose to engage us with their best weapon on a battleground tilted in their direction.
Only thing missing is Bockscar and Enola Gay