Yes, suspension of disbelief is exactly why North Korea is such a dumb idea. Yeah, you might believe at some point the Soviets might be able to invade parts of the U.S. or that China might be able to do it, if lots of bad things happened to the U.S. and a lot of good things happened for them. That allows you to suspend your disbelief that they could invade the U.S. and go on to enjoy the movie. North Korea in no way could achieve that end and hence, suspension of disbelief becomes more difficult, taking away some of the entertainment value of the movie. That is one of the jokes in the spoofs of horror movies. They always seperate, they never turn on the lights and so on are what make those movies function, but you have to suspend your disbelief in the stupidity of the characters actions in the light of a madman or monster picking the characters off, suspension of disbelief in order to enjoy the horror movie. Much like a fan of the Dark Knight who didn't like it because Bruce Wayne stopped being batman, and then went on to show a comic book image of a monologue by batman saying why he would never quit. We're talking about a movie about a billionaire who becomes a masked crimefighter, and does so successfully, without dying, that is suspension of disbelief.