Here is a NK fat boys response to diplomacy:

(2nd LD) N. Korea threatens 'physical' actions over new U.N. sanctions

We spend hours and hours and millions of dollars to thwart gun ownership here in the USA.

Yet we are worried we might upset a so far to date proven mad man that just happens to have nuclear weapons and who is also very outspoken how and where and when he will use them.

For me? Diplomacy has run it's course unsuccessfully. The only result to date is a mad man has done what he said he was going to do....be a nuclear power.
What have we accomplished? With our diplomacy we have allowed him to achieve his goals.

It is time to stop speaking softly and bring out the big stick.