It’s important to remember that of the hundreds of BLM protests, only the ones where something newsworthy actually happened got reported by the media.
If something never makes the news when everyone behaves, then your brain only ever receives the negative signals, reinforcing the human brain’s natural bias for remembering negative outcomes over positive ones. This leads to an inaccurate picture of what the world is actually like.
This is why statistical analysis is so important. Numbers are harder to fudge than memories.