Marginalized people usually serve as a sink for the rage and violence of people who are in power but are still bitter because an imperfect world remains perfect. Usually, these marginalized people simply eat those injuries, protecting society's stability. With riots; with graphic images of police beatings and murders plastered on TV and the internet; with infrastructure shutdowns; with resumed talk of things like police reform, social justice, and reparations, these people instead conserve and then redirect that rage and violence back out to the larger society to deal with. It's understandable that many do not like this disturbance of their peace, but that's kind of the point. And BLM et al. are not manufacturing it out of whole cloth; it's simply the intolerable oppression of an imperfect society, visited upon people who are used to shuffling it off onto lessers.