I don't know if the other posters are racist or not, but it's hard to see this as anything other than a personal attack. It would be better to discuss the issues rather than the unknown motivations of other forumers.
Setting all that aside, I wonder why we think it is so bad for people to not want the demographics around them to change, or to question any changes in the share of Canadian-born vs. immigrants (including those who don't speak much English or speak it as a second language). I don't think racism is required to explain why people sometimes don't like changes in these areas. Not everyone is gregarious or interested in learning about other cultures, and most people like to have a critical mass of amenities tailored to their own culture.
I can imagine a situation where someone grows up in a town and their peer group is gradually replaced by newcomers from another country. The person doesn't necessarily have anything against the newcomers per se, but they speak another language and mostly stick to themselves, or simply have different customs (e.g. go to some church or club that is not really open to people not from their culture). There can be some social drawbacks to this situation even before we start talking about things like housing prices (which are completely out of control in some cities).
Another angle is that it matters what happens to different sub-groups in a city. If we look at Vancouver, the population grew from about 2.1 million to about 2.4 million from 2006-2016. But the "European Canadian" population stayed the same or declined slightly (based on figures from
here and
here; I think the 2006 numbers don't include aboriginals, which are around 3% of the city).
Canada's non-visible-minority population grew during this period (due to natural increase). Metro Vancouver's a destination for visible minorities, but it's seemingly failing to retain and attract non-visible-minorities. There might similarly be a small but growing exodus of local-born visible minorities but I don't have numbers for that. I also have a feeling that there's an influx of Canadians who try to make a go of it in Vancouver and leave after a few years of living in a basement apartment.
To me the most obvious explanation of these overall trends is that Vancouver's standard of living is getting worse compared to the rest of North America, but it's still good compared to a lot of places in Asia, so we are preferentially getting a lot of migration from Asia. We also get a lot of real estate buyers and an unknown number of people who claim to live here for tax and immigration purposes but don't really. This probably isn't a great overall situation in terms of long-term outcomes for Vancouverites.