because Canada is a constant threat to the US. I mean, just look at a map! There it sits, huge, hovering over the US. You could simply drop on top of us at any time. I'm in Minnesota, so I'd be one of the first to get wiped out. Don't you realize how a couple centuries of having that kind of doom hanging over you affects a culture?!? If Mexico was smart, they'd get in on the anti-Canuck bandwagon too, because they would be next after we've been squashed.
Feel America's wrath! NO CHROMECASTS FOR YOU, CANADA.