I was stationed in SK and looked over the border at people looking at me from NK with some regularity.
I’ve seen the same look of insane hatred and anger from jihadis.
The Norks have been in a closed society and fed essentially religious dogma about their leaders for almost 3 generations. Before that, they were tightly wound.
I have zero doubt that most of the displays you see are genuine.
We also need to remember that these weeping, fake or not, hate America. We are their number uno Enemy. They remain to this day blaming all their woes on the USA...we are their reason for thier hunger and starvation...we are the reason they do not prosper. They are indoctrinated and fed this daily.