I'm not sure I'm getting what you are saying? Are you implying it's unusual for canadian police to abuse protesters?

I made a post a while back about the 2010 G-20 protest in Toronto with my own boring photos, but Reuters has a lot of bangers here.

Montreal cops are also notably shit, even among the entire class of bastards:

Further information has come to light concerning the Montreal Police Department’s use of agent-provocateurs disguised as “Black Bloc” protestors at a December 18 demonstration against police violence and the anti-austerity policies of the Quebec Liberal government.

More recently: Police brutality against anti-AI protesters in Montreal shows their true colours

And let's not forget the Kanesatake Resistance (Oka Crisis):

The Kanesatake Resistance, also known as the Oka Crisis or the Mohawk Resistance at Kanesatake, was a 78-day standoff (11 July–26 September 1990) between Kanyen'kehà:ka (Mohawk) protesters, Quebec police, the RCMP and the Canadian Army.