Haven't forgotten that, and it isn't lost on me that for conservatives "a few bad apples" seems a valid argument for police but not for protesters. However, that hypocrisy also goes both ways.
The reality is that groups tend to be associated with the most extreme actions of their members. It's a fallacy, but one committed by many if not most people in the real world.
en.wikipedia.org
People who are protesting need to be mindful of why they are protesting, and what is productive, or counter-productive, toward that goal. Violence during protests is especially counter-productive right now during this election and in this polarized climate. They had a window to let out some rage back in June after the Floyd video but that window closed months ago.