I think we're in agreement here.  When someone very actively incites a crowd to menace police officers (or anyone else) they are breaking one or more of several laws.  If it's menacing the police, they're interfering with officers who are doing their "duty."  Yes, there are individuals in the downtown area who are very happy to lead or to join that "mob" engaging in anti-police action.  I hope the police and DA's office review the videos and consider charges agains some of these individuals.