Thank you for providing an example of the selective presentation (exploiting selection bias) I was talking about. Here's the official version of the current Ontario curriculum guidelines, for anyone to read.

https://www.dcp.edu.gov.on.ca/en/curriculum/secondary-mathem...

There's a bunch of stuff about how the teaching of mathematics has been used to normalize racism and marginalization etc., but that's not the same as mathematics itself being subjective or colonial. (Personally I think even the stuff about teaching is kind of garbage because it's vague and non-actionable, but that's a different discussion.) A cherry-picked, exaggerated description like that is exactly the kind of selective presentation I was talking about. You have received a distorted view, and are now passing that on to others.