How to defy the will of Parliament

So the House of Commons passed the bill that says that US war resisters should not be deported. But it came with the help of the Liberal Party of Canada, which must mean that nothing practical will come from this. Nothing to make the US government mad at the Canadian government anyway.

It still has to pass the Senate, and then be signed by the G-G. Meaning it's technically still legal for Harper to deport these people trying to avoid being dragooned into an illegal war.