Pretty sure any country that has nuclear weapons and its sovereignty threatened would react in a hostile manner. This is only news because someone from the DPRK said it.
"I do not claim that every incident in the history of empire can be explained in directly economic terms. Economic interests are filtered through a political process, policies are implemented by a complex state apparatus, and the whole system generates its own momentum."
In earlier times North Korean threats were met with payments from the U.S. Fortunately, we stopped falling for that and I suppose the North Koreans are angry about it. I hate to think of what would happen to that country if it actually found a way to nuke the white house.