See this was stated in other cities as well, that the protests and rioting weren't connected..until oops, they were. And as the discussion about this issue is more than just the protests on the street, again, many places to gather information these days, there is, at the very least, a subgroup of the protests who very much think the rioting is the way to draw attention to their cause. You can refuse to acknowledge that, but it is quite clearly obvious to anyone who looks with an open mind...
I have gone from a person who thought Zimmerman should have been thrown in jail to someone who is seriously starting to think there is some sort of subversion of the United States going on here. There are protesters out there who think that justice will only be brought about thru violence. You can not acknowledge that, fine. But I listen/read much more than a protestors' sign..