It would seem to be a case of do as I say not as I do. We export to our allies all manner of armaments. Yet we take a holier than thou attitude when someone else does it.
The United States is not in a state of war with our neighbors as North Korea has been for the last half century. Doesn't that sound unnecessarily bellicose to you? If the US were North Korea, we would have invaded Mexico, slaughtering tens of thousands as we went.
North Korea is run by a nutcake who, as chief of the NK intelligence services, directed terrorist acts. For example, he had two of his agents board an KAL airliner out of India and plant a bomb on it, killing hundreds. He has made many assassination attempts on the South Korean leadership, in one case detonating a bomb under a grandstand that killed several SK cabinet leaders. Kim Jong Il also liked to kidnap people. Of course, everyone has heard about the Japanese he kidnapped from Japan and Europe to teach Japanese in the language schools for his spies but he also did recreational kidnapping. For example, he had his favorite S Korean movie actress kidnapped along with her husband. He made them make movies for him in North Korea.
That does indeed make the US holier than North Korea and its maniac leaders. However, since you think the US and North Korea are equivalent, I'd be interested to hear what examples of US belligerence compare to the crazed behavior of the mad dog North Koreans cited above.