I think the rise of far-right leaders (US, UK, Brazil etc) demonstrate that people will eat up whatever is offered as a mean to “shake up” the house when they feel things have been stagnant. I think unfortunately Canada is more akin to the US than France (they were able to stave off Le Pen) and we will have to go through a cycle of rightwing hindrance so people can remember why these people suck in practice, not just in theory. In other words, PP already has everything stacked in his favour and as contradicting as it is to attract far right voters while trying to maintain a moderate surface, it works.
Unfortunately I think you’re onto it. The only solace is that the alt-right rise to power is somewhat off-sync, so international relations are still one of the fields where they face some real resistance.