On the New York Times blog, At War, Farrell has described his captivity. This was an awful way to get the story, but Farrell is able to provide a glimpse of who the local Taliban are.
The Taliban may or may not be popular, but they are not foreign occupiers. It is impossible to believe that continued U.S. application of force will subdue people who simply fight the invader, distinguishing little between one sort of infidel intruder and the next.
What was it the U.S. is trying to accomplish in Afghanistan?