The Norks and Kim are puppets of China.
Everyone is overlooking what China has already suggested: China will take the Norks in hand if and when the USA withdraws from the south china sea which China is determined to take over.
That's what this is about.
I don't know if North Korea is a puppet of China, per se. It is certainly China's pit bull, but I don't know how much control China has over Kim (probably not as much as it would like).
China knows we will not--cannot--stand by as Kim threatens to attack our mainland.
The time for action is upon us.