Odd, the impression I've gotten from browsing the headlines is exactly the opposite. I see a surprising amount of shame--to the point where people were talking about sending a delegation from Seoul to Blacksburg to apologise in person for Cho's actions.

At least they're consistent. Whenever an American serviceman abroad is accused or convicted of some harm against against Korean civilians, there are shrill denunciations of the USA and its "shame" for letting "one of its own" commit such vile acts. I used to think that was all just political posturing, but now I see they apply the same standards to their own citizens.