Earlier quoted context omitted.
It's also easy to look at the summer's riots and forget that it was a mixture of peaceful protestors and violent antagonists. Until we have some convictions with evidence in court, we can't say BLM'ers killed cops. and to your 2nd point, I don't think it was ppl saying ACAB that raised the temperature and hatred towards cops. It was the cops killing innocent black people.
Some of the black people who were shot by cops were in all likelihood not innocent. Look at Jacob Blake for example. He came at the cops with a knife. Blake did survive though. Just because one event raises the temperature doesn't mean another event also doesn't. Saying ACAB and defund the police seems like it would also raise the temperature.
That you can speak this untruth so casually is discomforting. You appear to believe the lies that are being spouted by someone who is attempting to defame Jacob Blake, without ever having evaluated the original video. If you had seen the video, you never would have made the claim that "he came at the cops with a knife." Who was this person that lied to you in this way? It would be useful to name and shame this individual or group.
Please watch the video, reassess your claim, and cast your doubts upon these people who told you this untruthful story.