"...the culpability of the government in the Khadr case is far greater.."

Actually, the culpability of Khadr is far greater.  He professed allegiance to and took up arms on behalf of the group that claimed responsibility for killing 3,500 people in the USA on 9/11.  What exactly did he expect in return?  Marquess of Queensberry?  A lecture from his daycare worker?

Don't mess with the USA and then whine when they hang a serious licking on you.