It's something that the liberal mindset has never understood...the mentality of the bully. 'Toss your guns in the ocean and there will be peace & harmony'. Reality...look at Chicago. Unilaterally reduce the nuclear arsenal, apologize to the world,....and you have countries standing in line to smack you around.
I think Obama's actions are intentional. He does not want the US to be thought of as a "Super Power". He is working hard to change that stature, and NK (along with other nations) recognize his goal. Oddly enough, the only ones who fail to recognize it are the dolts that voted him into office.
"No matter how bad it gets, if you're still alive it's just another bad day."