I'm with Spencer Ackerman on this. It's really bizarre how, in the context of war, totally normal attributes of human behavior become transformed into into mysterious cultural quirks of the elusive Arab. I recall having read in the past that because Arabs are horrified of shame, it's not a good idea to humiliate an innocent man by breaking down his door at night and handcuffing him in front of his wife and children before hauling him off to jail. Now it seems that Arabs are also so invested in honor that they don't like it when mercenaries kill their relatives.
What a fascinating place Iraq must be! Maybe someday we'll discover that in Arab culture they have this weird thing where people's political allegiances are heavily influenced by issues of ethnic, cultural, and religious identity and that having their destinies controlled by a foreign, religiously alien, occupying army that doesn't speak the language is kind of a drag. Who knows?