A short article by an Afghan journalist, who blogs whilst in the USA on:http://www.afghanlord.org/

I am pretty sure this is the first Afghan comment on the issue I've seen; excluding the Taliban and officialdom.

Taken from his article:
The basic cultural characteristics of Afghans are based on a hierarchy of respect and care for family, clan and tribe. Considering this simple fact, it is very easy to understand why Afghan police soldiers would become rogue and turn their guns against NATO troops. Most of those rogue soldiers became lethal enemies after losing a member of their families through NATO airstrikes. If someone is killed as a result of an accidental NATO bombing, it is likely that he or she has family left behind. The family’s pride is wounded and someone in the family must bring the pride back....

Another reason motivating some members of the Afghan police forces to turn against NATO troops is the continuation of night raids....According to ISAF Data, night raids have killed over 1,500 Afghan civilians in less than 10 months in 2010 and early 2011.
Link:http://www.opendemocracy.net/opensec...n-blue-attacks