It was a joke. I'm sure he knows the difference. It was one of the few things he knew about Korea (either one) and used that as a comical bridge to his followers.
Give him some benefit of the doubt. I know that concept is as foreign as the very country he visited but its not a half bad philosophy.
I give all the credit to Dennis Rodman for his basketball skills. Besides that, he's a complete and utter freak, and should not be representing any nation/state/city/tribe anywhere at any time.
Keep in mind,Dennis Rodman is a product of the American public school system,so it only stands to reason that he DOESN'T know.
Blame it on his schoolteachers and his parents(his Dad was a "playa" ,too. Apples falling from the tree,and all that).
@MourningCalm We'll duh he didn't know. Point is he SHOULD know. Especially if your meeting the head of state.