You're just making shit up at this point.
Brampton is 44% South Asian (2016 Census).
https://en.wikipedia.org/wiki/Brampton#Demographics
Markham is 46% Chinese (2016 Census).
https://en.wikipedia.org/wiki/Markham,_Ontario#Demographics
I mean, this stuff is trivial to look up. Please don't try your Trump-ist truthiness BS on us.
The TL;DR of your post is "white genocide is bad m'kay".
If you think Toronto is racially segregated compared to the US you have a screw loose. Toronto is much more likely to have mixed schools and workplaces.
Your perspective is just baffling to me.