Disclaimer: I am a bleeding heart liberal and this may filter my observations. I have been to a few rallies/vigils/marches lately and all incidences of violence that I have witnessed either in person or through media has been instigated by the police. As far as I know,every documented case where a formerly peaceful crowd turns into chaos has been started with police shooting pepperspray, teargas, or whatever into the…
(I say 'individuals', not 'protestors', because the latter are peaceful people. The instigators are rioters and looters, a small minority of the people hiding within the former group.)
The other 25% has been initial violent action from the police. Things like shooting gas and charging forward when protestors were simply standing still.