"Dwelling on past wrongdoing and being insulted by people in the present times who had nothing to do with the wrongdoing is irrational"

Odd.  No Canadian has ever said anything like that about American blacks.
And yet his 'people' make up 25% of prisoners but are only 4% of the population, a disproportionate rate far in excess of blacks in the U.S. He's not just experiencing discrimination, he's having his human rights denied. He doesn't have an elaborate infrastructure in place to protect his interests in the government halls of power, he goes to the UN for help. He's watching Canadians bring in 40000 Syrians in a 'Canada is Back' political stunt and then milk it for all it's worth while he's living in what others have described as third world conditions.  Residence schools aren't ancient history and there are people alive today who ran them.

This isn't a matter of 'getting over it'. It never ended.