You notice these are all middle aged men, probably relatively well-in with the party. They got to be pretty well-in with the party by not showing any emotion that could be misconstrued later. Pretty much the only safe thing to do publically is applaud and laugh at Kim Jong Un’s jokes.
I also have to think letting K-Pop in is a good move for Kim’s dictatorship: if people believe this is the peak of foreign capitalist culture, it’ll only reinforce his position. (Little do they know that this is mild by K-Pop standards. Wait until they get to the 8-vs-8 teen girl group K-pop reality TV competition. That will send them screaming.)
