Here's some food for thought:
Omar Khadr is unlikely to get any sort of lengthy jail sentence. By the time his trial is finally over there's a reasonable chance that, if he actually is convicted and sentenced to anything, it won't be for much more than the time he's already served: He's been in eight years already. If he gets 2:1 credit that's equal to sixteen years.
Odds are he's out of jail sometime within the next ten years and fully eligible to return to Canada and resume his life as a free man.
After Canada spent the last eight years saying "fuck you Khadr", do you think he is going to be rehabilitated from his terrorist ways? Or do you think he's going to plot his revenge?
Had we done right by him eight years ago, had we sent him for counselling, had we stood up to ensure he was treated fairly, he might have grown into a man who rejected his father's ways.
Unlikely now, and soon, that'll be our problem.