Discrimination against indigenious communities

I was viewing a program entitled 'Dark secrets of Canada' on Al Jazeera TV Channel (one of my favourite channels). It was on how generations of indigenious communities got discriminated by the Canadian Government. Indians (South Asian) of my age would remember how some communities were undergoing blatant discrimination by Governments run by fanatic, attitudinally pervert political parties such as DMK (Davida Munnetra Kazhagam) in Tamilnadu and the atrocities that they were committing, unforgettably so. (I and numerous youngsters witnessed discrimination in our own country. I have inferred discrimination from documented historic evidences in South Africa, although by the time I had worked in the region, things had already begun to improve, thanks to untiring efforts by even minded political leaders such as  F W De Klerk, Nelson Mandela, and others).