There is an extremely blurry line between peaceful and violent protests. Unfortunately all of the chaos of recent days that the WaPo and others (Obama, etc.) seem all too eager to sweep under the rug has ruined things for everyone.
The protests are grounded in legitimate grievances, and engaging in public protest is a core right of the citizenry.
The violence effectively delegitimizes these protests in the eyes of millions of fellow citizens. I'm guessing that you may be one of them.
There are serious systemic issues with policing in America and if one only focuses on the bad actors on the "opposing side" then there is no dialog, only opposing monologues.