Going by BLM's list of demands, it seems to me that their issues with the police stem from specific police shootings (which they describe as murder), carding, police treatment of BLM protestors, and other issues
Carding is certainly an issue -- a bit of a hot political potato, actually. More on that in a second...
Police shootings, on the other hand, strikes me as a false premise. The vast majority of black persons killed by gunshot in Toronto have been shot, not by police, but by other black people. Yes, Sammy Yatim was shot, but he wasn't black, and the office who shot him was tried and convicted. Isn't that how it's supposed to work?
It is a fact that carding is more often something that happens to blacks on Toronto's downtown streets. But what might be the reasons for that? Are blacks more heavily represented by poverty, fatherless homes, hanging around on the streets? Okay, they'll get carded more often (proportionate to their overall numbers in society), than whites. But are these police problems, or social problems? Obviously the latter -- the police can't fix that stuff!