What are you on about? Nothing happened at the big BLM protest in Ottawa for police to get particularly worked up about. A few thousand people marched down to the US embassy, yelled for a while, a couple bottles were thrown at cops but that was it, and then they went up to Parliament and the PM literally went into the middle of the crowd. I can only guess you’re talking about the handful who, on a totally separate occasion, occupied the intersection at Nicholas and Laurier and were forcibly cleared out. It pissed some people off but was completely lawful and justified to remove them from the intersection,
The convoy protesters were removed from downtown Ottawa because for weeks they had blocked up part of the downtown core, forced to closure of many businesses and shuttered many people’s livelihoods, and had been warned for days that their occupation had long since crossed the line into being criminal.
It’s not rocket surgery. You don’t get to blockade a downtown core and harass thousands of residents for weeks and expect to get away with it endlessly. They were tolerated far longer than they ought to have been. You want to hold marches, clog up streets for an hour or two, be loud and annoying and wave signs, have at ‘er. But weeks is ridiculous. Fortunately the protesters ultimately chose to mostly leave, and to put up modest enough resistance that the use of force by police was kept quite minimal. Had they made different choices there would have been different paths to the same end result.