How can we win?

Some fighters boastfully declare that they can defeat their foe with one arm tied behind their backs. As our troops are fighting in Afghanistan, it seems that the people on our side are trying to tie both arms behind the back. From the Washington Examiner, the military has instituted a "Catch and Release" policy for Taliban fighters - the opponents. Makes me wonder what we are doing there? And why are we fighting if not to win?