Not surprising at all. Like others said, it is a matter of societal change. Another factor is that South Korea would be ruined if refugees just started pouring in from the North en masse (I believe I have talked about this before); it would be like what happened in West Germany. I also seriously doubt the US would want to upset our great partners, South Korea and China. With this political and economic climate, that would probably do more harm than good. For now, we should probably just figure it will be business as usual.