Here is a NYT article trying to explain why things, so far, haven't boiled over in Afghanistan in the wake of the killings.

http://www.nytimes.com/2012/03/15/wo...ed=2&ref=world

The article says it is a combination of religion trumping all, a quick and well spoken apology, fast payment of blood money, the fact that it wasn't part of a military operation and related to that, what seems to be the realization by the Afghans that this was a criminal act by an individual for which there is at least a chance of the death penalty being imposed. Very astute analysis.