After 11 years normal people would have figured this out.
"Please do not get offended if you see a NATO member blowing his/her nose in front of you," the guide instructs. they may show their excitement by patting one another on the back or the behind," The guide also warns Afghan soldiers that Western troops might wink at them or inquire about their female relatives or expose their private parts while showering — all inappropriate actions by Afghan standards.
They aren't killing us because of this but because we are an occupying Empire that keeps tens of thousands of troops in their country that kills them. That's why!