There are 600+ million hispanics in North and South America, Canada has managed to allow a whopping ~400,000 of them in, representing a minuscule 1.2% of the country. The US is over 20% hispanic and about 16% black; Canada is 2.9% black. It sure looks like someone has a claim to the land.
Canada's merit based immigration system was designed to intentionally keep poor immigrants out (ie the majority of the population of Latin America).
New Mexico for instance still has families with large tracts of land granted by the Spanish Crown before the US even existed.
All of those are orthogonal to the demographics.
Where demographics come into play is that, in my experience, the issues of First Nations people are more a part of common Canadian politics than Native American issues are in the USA. That focus likely also plays against a sense of other Canadians feeling too rooted there.
Contrast this to places like continental Europe and the US where geography has not provided natural barriers and the gap between immigration policy and reality can be considerable. This gap leads to a high degree of immigration cynicism from the local populace because they perceive the government to be unable to control it. He considers this unaddressed cynicism to be a contributing factor to the wave of nationalism that's going around.
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"In Toronto, three-quarters (75.8%) of its population consisted of people who were foreign-born or had at least one parent born outside Canada." [1]
Canada has a LOT of immigrants.
It's true that Canada doesn't have a lot of black or Hispanic people, but a quick look at a few sources suggests they have at least as many visible minorities as the US. (Both countries are close to 20% visible minorities, but I'm having trouble finding comparable numbers.) Most of Canada's visible minorities come from Asia.
[0] http://www12.statcan.gc.ca/nhs-enm/2011/as-sa/99-010-x/99-01... [1] http://www12.statcan.gc.ca/nhs-enm/2011/as-sa/99-010-x/99-01...
Grandparent comment is talking about how most Canadian immigrants are filtered via k-selection.
On the other hand in America the Black and Hispanic minorities did not arrive here via a k-selection strategy, however Asian immigrants did, and it is reflected everywhere.