I have seen no cases of violence during these protests. In fact they have all been peaceful, certainly some of the rhetoric has taken a nasty tone but if anything it has just now reached the level it did while Bush was president and she along with every other democrat never seemed too concerned about it then. In fact many of the lefts protest did turn violent and some were hurt.
This reeks of manufacturing fear to me, I have little doubt this was carefully orchestrated by the democrats, they have taken a few hits recently and they are looking for a swing in public sentiment back their way.