You probably haven't been paying attention, but the US Gov't make dissidents disappear all the time. They just do it with a velvet glove on, whereas we're more accustomed to complaining about/being distracted by the heavier hand represented by the propaganda against North Korea.
The US gov't is not as innocent as you might think when it comes to handling dissidents. Its just very, very good at maintaining the facade that its all done 'for the greater good of the people of the United States and its possessors'. The USA is, after all, a PR-first nation.
This could be a story about Hilter and people would find a way to engage in moral relativism.
It makes not one iota of difference if the human lives we improve are in Kaesong, North Korean, or Jackson, Indiana. Does it? Then, start at home: get rid of the NSA. Close Guantanomo. Cancel privatized prison systems that incarcerate more prisoners in the world than any other nation.
See "Whataboutism"
Reading his argument charitably: the Snowden revelations showed us that the penetration of the tentacles of our surveillance is at least an order of magnitude greater than we imagined, and that many things we thought rendered it technically or economically infeasible are in fact quite feasible if the resources of the NSA are thrown at it. More significantly: our surveillance is fantastically disproportionate to the lyrical encomiums we sing to our free society and democracy and so forth. At least in North Korea it's par for the course.