If you are going along with "voluntary" sharia in Canada, then at the least, you are agreeing to the permanent slavery of mulim women in Canada, because that's what sharia is. If you still want to argue this, you're hopelessly PC, and are just on the downhill slope to Malmo Sweden.
It's only slavery if they submit to it voluntarily. Muslim women already voluntarily buy into the subservient role that Islam puts them in - I can't do anything about that. And like I said, non-muslim women in abusive relationships also often live in fear and are afraid to go to the authorities. And don't call me "PC", or I might just call you hysterical.