Since there is no such thing as counterfactual to history, we he no way of telling (at least within the realm of empirical science) what an alternative course of events would have been under a difference set of circumstances. Hence we cannot really tell withouth wandering into the realm of metaphysics or ideology whether countries like NK, Russia, or Germany would have been better or worse without Kim Il Sung, Stalin, or Hitler, or if the world would have been a better place without the world war II, the cold war or US imperialism. We can only speculate about that, and in so doing, impose our own value judgments.
I thus suppose what people on this object to has less to to do with NK or Russia than with your value judgments - especially your unabashed panglossianism that views US institutions and policies as the best of all possible alternatives.
wojtek