one thing is for sure.These people dont give a damn about the war.They just want to get the hell out of there.The only motive is survival till someone decides that they should return.Since they are isolated they will in many cases do things otherwise they wouldnt have done or things nobody would have expected in a war.
On the other hand iraqis have the stronger motive.Get rid of the intruders.And they have every right to do so.Its their country