"Oh, for some people it used to be at least partially just about racism...even if was purportedly about nationalism or immigration, race was always there. I think it's just less of an issue now that there's a whole generation of Canadian-born non-whites."
Not to split hairs Scarberian, but in the interest of discussion, I think we should be careful about the term 'racism' and should reserve it for when it is really clear. For instance, the way I see it a remote African village that reacts warily to a group of non-black newcomers isn't being 'racist'. Similarly a post-war and pre-global, predominantly 'white' Canada wasn't being 'racist' towards newcomers in quite the way that the term would imply. Wary of change, yes. Ignorant of difference, yes. Culturally insensitive and politically incorrect, yes; but Canada was not unique in this, nor are white people. So to categorize or essentially vilify those people as 'racist' in the way that we would think about that term now seems wrong to me. That said, at such a time of social and demographic change I'm sure there were incidents of racism pure and simple too.
"It would be interesting to see how quickly, or if at all, members of various groups/ethnicities begin to call themselves ethnically "Canadian," like how many generations it takes, etc."
Multiculturalism doesn't seem to encourage this.