what does being a Canadian mean?

Multiculturalism was good when Canada opened its doors to the world at the beginning of the 70s. It was good in that it stopped racism. But now, Canada is being inundated under the waves of immigration and there is no Canadian identity left. I think now Canada has to have a revision in the ideal of multicultrualism and instead look more into the "melting pot" idea. The newcomers to Canada have to adhere to a minimum of "Canadianness" and not be totally separate from the larger community and living in their own tiny communities.