This is not a systematic matter in US Military. The problem is that many of the soldiers within the US force and the NATO force have no sensitivity and respect toward other cultures and religions. Most of the US soldiers are from poor family class of mid West america who have not even left their own little town prior their deployment in Afghanistan. So, they just don't know any better.

All they know is that they are there to help the Afghans. When they experience their comrades getting shot at or killed by other Afghans, these kind of unrespectful reaction comes natural to them unfortunately . (more)