Dale‘s points are well made, particularly the one that when Walker joined the Taliban, he could hardly have reasonably expected to find himself at war with the United States! I have a slightly different take on it, however.
I think many of the comments regarding the dismal Walker begs the question of why is he being regarded as having any particular affinity or duty of loyalty to the USA at all? Just because he originated from there, how does that somehow make him irretrievably beholden? People come from all over the world and emigrate to America and the US has no problem with them ‘becoming Americans’. So why is it so hard to see the process in reverse?
For goodness sake, if going to Afghanistan and joining the Taliban does not constitute the complete and utter repudiation of not just the United States but the entire western world, then I guess I don’t know what does. When he was captured, as far as I know he was certainly not yelling “I’m an American! I wanna see the nearest American consulate!” Far from it. There should be no expectation that he still owes the US anything or the US owes him anything.
If it turns out he is a member of Al Qaeda, then he is still very much our enemy and should be treated in the same manner as we treated captured members of the SS or Gestapo or Nazi Party after WWII. If he is just a member of the defeated Taliban’s army, as seems likely, then just question him and then dump his sorry arse back in the hell hole we found him in. Even if he was involved in the death of CIA man Mike Spann, so what? Walker was a soldier with the Taliban and we were the Taliban’s openly declared enemy. People get killed in war. That is what soldiers do. Big deal.
I do not think Walker is ‘just a misguided kid’. I think he is a misguided adult who made his choices freely and should reap the consequences of supporting a vile regime in Afghanistan. But his crimes are again the Afghan people who suffered under the Taliban, not the US. Unless he turns out to be a member of Al Qaeda, leave it to to the Afghans to deal with him.