I don't think that Canada, for any reason, wants to stoop to the level of those that murder people that are so abnormal that they murder. The middle east, and other countries where people have fewer rights and freedoms, are places where the archaic practice of an eye for an eye marches on.
He should spend a lot of time in a cell next to Bernardo. Rumour has it they attended the same post-secondary school at the same time ... so maybe they have more in common than they realize.