I'll preface this by saying that as much as I support the reasoning for the BLM protests, it was the wrong time to have a large gathering of people. There were other ways to protest.
But you are absolutely stretching into your own ideology and bias if you think it had anything to do with the current spike.
No one who went transmitted it to anyone else who went, as far as we know.
Some people are just trying to use it for political point scoring, which is especially dumb seeing as the protests were discouraged by the premier. But again, it's irrelevant.
It does make me laugh in a sad nihilist sort of way when I see the car parks at Highpoint filled to the brim, school's packed to the rafters, and people cramming into each other's homes for dinner parties every day. Then people think a couple of hour out door protest has anywhere near the impact.
People just don't understand infectious disease.