That´s wrong.Kim seems to be trying desperately to get American attention. He can't, though -- bin Laden had the same problem. We simply are not interested in anything going on outside this country, except colorful things like the Pope washing prisoners' feet, which is a headline running now instead of Kim's threats to start a war.
There really are only two ways to get our attention. The best way is to hit our homeland; we tolerate that poorly.
The other way is to hit bases abroad, but unless there is a massive kill, that doesn't work either. That's why we have so many personnel in South Korea: the treaty always called for those to be "tripwire" troops, whose death (there are 30,000 now) would provoke a for-sure war with an indignant and angry America. I THINK that might still work.........
Does anyone think it wouldn't? It didn't work to hit the U.S.S. Cole, we blew that off. It certainly didn't work to hit the Benghazi embassy ---- we were angry, but only at other Americans, not the Libyan killers. So I'm not perfectly sure hitting our base in Korea would work to start a war, if that is what NK wants.
North Korea does not plan to hit America´s homeland or kill Americans. South Korea´s Army is strong enough to be an enemy to the North. No need for US Troops to be deployed in order to defend S. Korea! 27.000 US-Troops are not that much anyway.