Culpable of what?
Afghanistan has been invaded so often by so many people over so many centuries, it's like the Haiti of Asia, an economic basketcase.
  The Taliban brought some stability. They eradicated the poppy trade.The country has always been Islamic. They are more nasty than we in the West like. But that's the way Islamic nations want to be governed. Afghans want the West out.
  The best anyone can do for Afghanistan is stop invading it. The Pakistanis, on the other hand, are Afghans cousins. India is Pakistan's enemy and probably trying to destabilize Afghanistan. Some kind of economic and/or political unity could only be good for Pakistan and Afghanistan.