[buckler]

Do you usually ask the same question to white Canadians as well ("Where are you from?", "Oh, where are your parents from then?")? It would be safe to assume that white Canadians are generally confronted with those questions with much less frequency than Asian Canadians are.

May be some do have a sense of self-hatred like you said, but I would guess most people are simply annoyed by those questions so they respond adversely. Like others have mentioned already, it's really frustrating from a point of view of a person who might be a 3rd generation Canadian, as the questions can make him/her feel like perpetual foreigner. Why can't you take "Canadian" as an answer when those people have lived there for all their lives and might have never even visited their grandparents' country of origin?

As you've said you're an immigrant, your ethnicity and the fact that you're a first generation immigrant might be a big part of who you are (if you do treat them importantly, that is). For second generation Canadians and on, that might be not so true. It's not that they are embarrassed by their respective ethnicity, but it just doesn't play a big part in their lives in their thoughts.