Your theory is predicated on a series of flawed assumptions. You are assuming Canada is not susceptible to all elements of cultural transmission. All aspects of American culture are transmitted to Canada as a result of media penetration, economic connection, blood ties, and all of the elements that make Canada and America part of the North American wing of Western Civilization. Similarly, Canada penetrates America. It doesn't matter whether the penetration and connection are symbiotic or parasitic. It is what it is.
Further, insensitive and crazed Americans visit and move with impunity around Canada. I'm always welcome in Canada by my relatives just as I always welcome them to California. Over the generations the good, the bad and the ugly move back and forth in a seamless fashion.
Those who come to lecture Canadians about the processes of history aren't ignored by Canadians. Each of us can learn from the actual experience of others which is outside our own experiences. Take yourself as an example.
Your arguments apply even more strongly to the Southwestern States which with Mexico have historic and current, ethic, economic, and familial ties.
Hell, I've watched "Zorro".