This is much better than blundering into war with a real nation.
China's concern as you know and probably anticipated above, is securing "loose nukes" and remnants of the army. Both S. Korea and Japan have much more at stake than we, which should be the restraining factors on any tantrum by the US.
In politics and economics the rational actor schools are now in disfavor. One of my more distinguished colleagues talked me into using one of his books in government 1 on that subject. I never accepted it as an appropriate model and now even he doesn't.
You probably agree with many here that the rational model applied to markets fails as well, although it has guided my estimates of where technology leads in the long run. First purchase of TSLA in August 2010 as low as $17.80, last in April 2016 at $249.95, respectable average lifetime cost at just under $60. However....
Pitifully small number of shares—commensurate with income from someone whose supped at the public trough for life—while enjoying and spending nearly all of it on the way.