People are so ignorant about our history. about all history, really. And so they read the breathless accounts of 'mass graves' which suggest some horrific slaughter and are appalled. But that's not what has been found here. What was found were unmarked graves. And you will find the same anywhere there were institutions like this, be they natives or not. Similar such graves have been found in the UK, Ireland, Scotland and the US, as well as Canada. Orphanages, except those in big cities, all had them, as did homes for unwed mothers, prisons and mental institutions.
People don't realize how poor Canada was when this school went into operation. If you've ever been in an old house, a hundred years old, in the winter, and thought about how drafty it was, well, that was where the better off lived. Except there was no furnace or boiler back then. Most people had very substandard housing which was cold as hell in winter, shacks and cabins with little or no insultation. And most people scrambled to get enough to eat. And if they didn't, no one cared. The very concept of government taking care of people hadn't even occurred to anyone yet. There were no social services and if you didn't have money you didn't get a doctor either.
As a result, waves of deaths swept the country every year from Tuberculosis, Scarlet Fever, Measles, and even Influenza. A third of Canadian children died before their tenth birthday. So yeah, in a very large school which operated for a very long time in a rural area you're going to find graves. Kamloops was a tiny fort and railhead back then. Even up to 1950 the population was under 2,000. So when a child died, it was buried there. The government didn't think it could afford to ship the bodies home. And likely didn't care anyway. Government rarely cared about poor people and they didn't come any poorer than natives.
I'm sure they'll wind up exhuming the bodies and they'll find all or virtually all died of various diseases. Just like the kids in orphanages etc. This is no different than you'd find at similar institutions anywhere in the world that date from that time. So no, this isn't some kind of horrible crime of mass murder, just how the world was back then. Nor was it racism, just the callousness of government. Hell, look up the Duplessis orphans some time and see how cold and callous government can be to white kids. They were wrongfully transferred to psychiatric hospitals because the feds paid more for mental patients, and then the Quebec government let the CIA do mind control experiments on many of them. And that was in the 1950s! Some of them are buried in unmarked graves too.