Fair enough... So, what exactly ARE you arguing then?
Let's just presume for a moment that Khadr didn't throw the particular grenade that killed Sgt. Speers and wounded his comrade. There are still many problems with his presumed "innocence," as well as the notion that he's due some compensation for his troubles.
For starters; he WAS a combatant in an enemy force that was attacking American troops and their allies (including Canadian soldiers.) That by it's very definition is treason. The penalty for that crime is execution. But, since Canada doesn't execute prisoners any more, the penalty would have instead been commuted to life imprisonment - not a reward of millions of dollars.
Now I know liberals like to play the "He was just a child." scenario, but here's the deal. Nobody's sure when he actually arrived in Afghanistan, or more specifically, when he actually got behind the enemy lines. It's highly possible he was a child soldier. The UN definition of a child soldier is 14 and under. Child soldiers are forbidden under international law. But since the Taliban was an outlaw organization anyways, nobody expects them to respect the rule of law.
Now, part of the claim that Khadr had put forward involved "psychological torture." Considering the reality of the situation however, I have to seriously wonder about the veracity of his claim. At least as far as care under the American's goes. I would think that the environment that his own father placed him in did far more psychological harm than anything the Americans could have conceived. Perhaps he did lose a few nights sleep in Git-mo. One has to do a little looking in the archives, but there are photos of a young Omar (courtesy of Al-Queda) playing with body parts like they were toys. A young boy. A developing mind. Horrid battle conditions. I would suggest to you that this is far more likely to be the cause of any "psychological distress" the man may be facing today. And that sure doesn't justify a reward of millions of dollars either.
Now as for potentially being a child soldier, he lost that status when he turned 15. You may not like, or agree with the age of 15, (and the UN does try to discourage people that young from military service) but that is the age, according to the UN, when you are old enough to go into a war zone as a combatant. As a combatant, he is fully culpable for his actions.
Once again, one has to do a little looking in the archives, but there are videos of a young Omar (again, courtesy of Al-Queda) assembling IED's and teaching others how to do the same. How many soldiers - Americans, Canadians, French, British, etc, were killed, or maimed by these devices that he personally assembled? We'll never know. Again, this is a criminal act not worthy of a reward of millions of dollars.
But the Canadian government had a "duty" to bring him home. Really? Did they? At any given time there are over 1500 Canadian citizens imprisoned in foreign lands. They go to these places, offend some law, and find themselves in trouble with the local authorities. Some of them are even in a much worse situation that Khadr ever was. Some of them will never return home.
Canadians often forget that Canadian laws and protections STOP at our borders. Where we have diplomatic relations we can attempt to work with the local government. But once you step out of the country you are essentially on your own. The government can't always fix YOUR screw up!! The suggestion that Canadian officials were expected to march into an American military prison and demand the release of Khadr is simply preposterous. There are channels to follow. This guy (or blame it on his father, if you like.) got himself into the mess. And now he receives compensation because we didn't get him out fast enough?? Words cannot express my disgust at this whole situation.