"I agree but I would pose the question of Canada joining the European union. Would the answer be the same or to the same degree?
I think with Europe it would be more natural."

I think the same. Pity Canada is so far away from Europe. Free mobility of labour and goods is one of the first priorities of the European Union, but wouldn't be a big gain for both countries. If the European Union survives the present crisis, the next step will probably be the integration of (Turkey and) Russia. Might take some time, but then Canada at once will be a lot closer to Europe.