Kim Jong-un should be tried and executed just like Nazi war criminals.

One of the things that helped the world stand strong against the Nazis, was the meticulous documentation via film and writing of the atrocities of Hitler and his allies. The world is silent because the Kim dynasty managed to black out their crimes.

We have testimonies of North Koreans who managed to escape. Their words would make your blood curdle.

This is an excerpt from the report you can find here:
https://www.ibanet.org/Article/NewDetail.aspx?ArticleUid=8ae0f29d-4283-4151-a573-a66b2c1ab480

In 2004, first-hand testimonies from North Korean defectors detailed execution, torture, & chilling evidence that the walls of Camp 22 hide an evil secret: gas chambers where horrific chemical experiments are conducted on human beings.
https://amp.theguardian.com/world/2004/feb/01/northkorea?__twitter_impression=true

Thomas Buergenthal, a judge on the International Court of Justice, said the conditions in the Korean prison camps are as terrible, or even worse, than those he experienced in Auschwitz and Sachsenhausen Nazi death camps as a child. https://www.timesofisrael.com/holocaust-surviving-judge-n-korean-camps-may-be-worse-than-auschwitz/