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What are we doing about it. Just averting our gaze? Preempt these basturds. Why are we allowing this?"
It's being allowed, because most of our fellow Americans have no will to fight. Too many who comment on the matter have proposed actions that won't work in the real world.
If Kim Jong Un were killed, the next man in line would take his place and behave much as he does. It's a very uniform nation with uniform leaders. The line of succession would be virtually endless.
If the nuclear facilities in North Korea are destroyed, the North will attack. Obviously, communist/fascist nations are also expansionist by nature. For them, the thought of losing their perceived ability to begin conquering other countries is the thought of losing all that they hope for. It's intolerable and unthinkable to them.
Sanctions obviously won't work for the reason stated above.
Invasion, occupation, and in a sense, denazification would be the only known feasible way to stop the nuclear buildup in North Korea and the larger real instigators behind it.
Denazification, cumulative review. Report, 1 April 1947-30 April 1948.http://digital.library.wisc.edu/1711.dl/History.Denazi
But too many political constituents are attached to the current market stability, and others, to the big spending on salaries in civilian programs.
But it looks like it's going to happen anyway, and probably not only with North Korea. It's become a matter of how long the most influential political folks can put it off. As it is put off, enemies continue to build up and choose the time that they prefer for World War 3.
In my humble opinion, it would be best to build a personal or family fallout shelter and stock up. Too many important but difficult manufacturing and defense needs have been avoided for too long.