No police were killed by BLM protestors. And considering the vastly larger amount of protests with BLM (more than 9000 protests), it's a wonder more violence didn't happen.
Had every BLM protest been as violent and unhinged as the capitol protests, we would have had thousands of deaths.
> Had every BLM protest been as violent and unhinged as the capitol protests,
Aside from the single police officer, all the deaths seem to have been protestors. At least two were killed by police - one was shot by the police, and the other was pushed off a balcony.
It is the case that between two and three dozen people were killed during the BLM protests and associated actions like the autonomous zone, with nearly all of them, judging by the articles I have found, being victims of the protestors rather than protestors themselves.
Had every BLM protest been as violent and unhinged as the capitol protests, we would have had thousands of deaths.