> What precisely did I say that makes you think I'm trying to excuse, rather than explain?

By only pointing a finger to the other side, you strongly hinted that the behavior of citizens was not only the cause of the behavior of police, you implied that it was also the solution to the problem of the behavior of police. This causal link may or may not be partially true, but nobody really cares about the cause, unless it helps with providing a solution to the problem. By only pointing to the cause, you imply that the solution to the problem lies there too, which, in this case, is both very questionable, and classic victim-blaming.