Welcome to the country who thinks their leader stuffs rainbows.
I don't think most of the citizens really believe that
Seeing as they have no contact with the outside world and rely only on information from their leader, they probably actually do.
Korea didn't split until the 50s, and I doubt parents would just let their kids believe their dictator was a godalso, this whole situation is evidence that they don't really believe it. what sane person would defy a god?