North Korea is always described in the US media as insane, but I think their government is acting rationally to preserve themselves in the face of constant US threats. We are told they are evil because they are building nuclear weapons. I think they aren't evil, but rational, to defend themselves against the US.

We know so little, and much of what we know is wrong, about the history of North Korea. Japan ruled Korea as a colony from 1910 until their defeat in 1945. Then the Soviet Union controlled the northern half of the country, while the US controlled the southern half. Koreans who had fought in the resistance to Japan formed the government in North Korea. Korean military officers who had served Japan formed the government in South Korea. A civil war started between these existing enemies in 1950. The US saw it as part of the Cold War against international Communism. The US completely destroyed North Korea for 3 years. We firebombed every North Korean city to the ground worse than German cities in WWII. North Korea still fought the US to a stalemate, and we quit in 1953. Ever since then, the US military has threatened North Korea, constantly flying nuclear bombers near them and sending nuclear submarines to their coast.

The North Korean government has developed nuclear weapons and missiles for decades. In 1994 the US and North Korea signed the "Agreed Framework" wherein North Korea committed to freezing its illicit plutonium weapons program in exchange for aid and a step-by-step normalization of relations between the U.S. and the DPRK. Implementation of the agreement was troubled from the start, but its key elements were being implemented.
It is hard to figure out who to blame. The US seems to have cheated first. Part of the problem was the partisan split, with President Clinton and the Democrats supporting, with Congressional Republicans opposing. When Republicans got a Congressional majority in 1995, they blocked the deal's funding. When Republican Bush won the Presidency in 2000, they announced their hostility to the Agreed Framework but partly maintained it. In 2003 the North Koreans were found to have a secret nuclear enrichment program, finally killing the deal. https://www.armscontrol.org/factsheets/dprkchron

Now the newly-elected South Korean President Moon Jae-in favors a peaceful reunification between the two Koreas. The American President has chosen advisors who want war, but he is unpredictable. Nuclear war would be devastating, not only to the millions of people killed in the Koreas, but the entire world in a “nuclear winter” causing crop failure for years. I believe peace is possible, not guaranteed at all, but possible. Meanwhile, let’s try to get news free of traditional American bias and propaganda.

Check out the middle story in this podcast: "The amazing news from Korea about the prospects for peace and de-nuclearization: historian Bruce Cumings of the University of Chicago comments, warning that the Washington consensus opposes a treaty. His books include The Korean War: A History and North Korea: Another Country." https://www.thenation.com/article/trumps-financial-crimes-are-more-likely-to-bring-him-down-than-russiagate/

A short history lesson is here: https://www.washingtonpost.com/news/fact-checker/wp/2017/08/09/history-lesson-why-did-bill-clintons-north-korea-deal-fail/?utm_term=.305676c522c3