So your logic is that since he's not responsible for how he is, Canada should let him roam the streets?
Definitely not a good idea at this stage. Personally I do see him as a child soldier. He didnt chose to go to Afghanistan. Very few kids get to chose where their parents move to. Given he has now been in prison nearly half his life he likely has some problems as a result. He'll need some sort of therapy if he is to be released at some point.