"They really don't care how it's being seen in the rest of the world," he said. "My best guess is the people who are writing it aren't writing it for us. They're writing it to show their allegiance to the dear leader or the dear general."
The North Korean rhetoric and posters of North Korean soldiers destroying imperialist powers resemble the propaganda and tone of the former Soviet Union, said David Satter, a longtime Russia scholar now with the Hudson Institute in Washington.
Just as Nikita Khrushchev vowed to "bury" the U.S. in 1956, Kim is trying to prove his mettle as a dictator by issuing bellicose threats, Satter said in a telephone interview from Russia.
"Like with any group of gangsters, the new guy is very determined to show how reckless and tough he is," Satter said. "It's consistent with the way Communist leaders of the old Soviet Union behaved."
While the Soviet Union stuck to print and television, North Korea has gone multimedia.
A video uploaded by North Korea's official website, Uriminzokkiri, and available on YouTube made headlines in February for suggesting a possible attack on the U.S.
The piece, shot as a music video, features a young North Korean man dreaming of flying in a rocket and witnessing the destruction of what is presumed to be a major American city, as an instrumental version of the 1980's pop hit "We Are the World" serves as a soundtrack.
"In America, I can see black smoke," the man dreams, according to a translation of the captions by NK News, a website that covers North Korea. "It seems like the devil's nest that habitually caused wars of invasion and persistence are finally burning under the flames it itself has ignited."