All of those and also it's not like the riots were spontaneous forces of nature. They were made to happen for political purposes and they were not undertaken in the wake of the verdict for political purposes. Expect the left to do a lot of fake "attempting to reach out to breach the divide" in coming months. This of course will all be undertaken with the assumption that the left themselves already stand at the point to which the rest of society needs to do all the bridge-building. And at every point of the way, the left will proclaim their disappointment at society's failure to meet their challenge to "bridge the divide". That's the playbook.