protectionism is what kills your economy because it cannot raise aggregate output. You can't "save jobs" in total, only a minority at the expense of the majority. When you raise tariffs on Chinese imports every consumer takes an economic hit, which otherwise would have gone to.. job creation and consumption. You'll have on net fewer jobs because you've made your country poorer.

Not to mention, Canada being largely a service and resource extraction economy doesn't even really compete much with China.