Not to be a spoilsport, but often assumptions of cause-and-effect are mistaking correlation (i.e., coincidence) for cause-and-effect. Comparing Canada with the U.S. – next-door neighbors – makes more sense than, say, with Japan. But even that comparison is problematic. Canada does not have 13% black and 17% Hispanic populations like the US does. (It does have lots of East Asians, though – Vancouver, BC, Toronto’s Chinese community.)