Killing aid workers is what the Taliban does. It is what the Taliban wants to do. But read the four principles Watkins mentions as though they were some sort of pass you could wave under a Talib's nose so he won't chop your head off. It is precisely because these are the principles that govern a humanitarian aid worker's service that the Taliban targets them and kills them. It is precisely because the delivery of humanitarian aid in a place like Afghanistan cannot be "autonomous from the political, economic, military or other objectives that any actor may hold" that it is delusional to carry on in this way.