"It's the government."
And presumably any Parliamentary investigation into the detainee issue would be focused upon the behavior of the political players involved. If the Harper Government truly believes that malfeasance on the part of any of these players entails the guilt of our troops in Afghanistan, then let them be the ones to make that argument and pursue the consequences.
As to the behavior of Canada's military in this whole affair, it seems to have been in line with the high professionalism we expect of our soldiers. The detainee "problem" was raised within the ranks (and in our diplomatic core, and elsewhere) and our civilian leaders were informed. The outgoing Martin government did not act, and the incoming Harper government did not act quickly enough.
Again, if there's more to it than that, let Ezra and the gang lead the witch-hunt.