If you were born here, you're Canada.
If you've lived here for most of your life, your Canadian.
We all came from far and wide to settle here. So it's either the only true Canadians and natives, or all those that live and Canada and share the same set of values are Canadians.
The fact that Tamils are still concerned about the killing occurring in Sri-Lanka does not make them any less Canadian. They are simply concerned about those living in country the country they came from.
Just like a person of Italian, Irish, British or Chinese origin should be concerned about what goes on where he came from.
If we want Canada to be a mosaic, we need to be aware of the struggles these people face, and be compassionate.