To be fair, I don't think anybody's talking about not having any trade. The choice isn't between the kinds of free trade deals that Canada has in fact been signing over the last 30 years and not trading with the world. Canada traded with the world prior to these kinds of free trade agreements and would have continued to trade with the world in their absence. These agreements aren't about whether we trade or not. They're about the terms of trade.
Is there any empirical economic evidence that would convince you that these kinds of agreements aren't working well for the Canadian economy? If so, what kind of evidence is it?