The facts that most people choose to ignore.
1. Khadr was born in Canada and brought to Afghanistan by his father at age nine. He was fifteen at the time of the incident.
2. Khadr was never convicted of anything in a legitimate court of law. 
3. He was illegally imprisoned for ten years, tortured, denied consular services, and told that only if he pleaded quilty would he ever be released from the Guantanamo Bay concentration camp. 
4. The official report by the American soldiers at the scene claimed that they saw a middle-aged man throw the grenade. The report had an addendum added three years later claiming it was Khadr who threw it. None of the soldiers at the scene testified to the addendum.
5. Khadr was shot twice in the back while on his knees facing away. 
5. Canadian officials and CSIS were complicit in Khadr's incarceration, and although every other Western nation that had prisoners in Guantanamo Bay, repatriated them, Canada did not attempt to.
All these facts can be verified.