I think part of Canadian culture is being a little bit restrained in our emotional reaction to nationalistic ideas. Our pride in and loyalty to Canada is deep, but not overt if that makes any sense.
Or maybe I'm just projecting. 
I think Canadians, in general, are more reserved than say Americans. Maybe that has something to do with it. We also don't tend to boast as much, and are more polite and apologetic etc.