One of the recurring ideas of riot coverage is that the mob is "mostly peaceful". They mean this to cover individuals -- only a "few bad apples" are throwing rocks into the heads of police -- and to cover the time-frame -- for hours the demonstration was without violence, except for that brief instant when some guy threw a rock into the policeman's head (and that other brief instant when some guy broke the windows of an apartment building).
Members of a mob are only emboldened to throw rocks at cops, etc., when they have large enough numbers of people who literally have their back. By the time the mob dissipates, curiously nobody is willing to get into any serious shit with the police, who now outnumber the handful of remaining rioters. The members of a mob who aren't directly aggressing against the cops are supporting those who are, and they know that -- that's why they're there, admiring the front line soldiers, rather than trying to stop them from giving the group a bad reputation.
And only an autistic would meter the flow of time to see what percentage was spent engaging in violence, rather than the extent of violence inflicted during the course of an event. Aside from that brief moment at the end, Abraham Lincoln was enjoying a safe and sound evening at the theater, being pursued by an assassin who was non-violent for 99% of his time in the building.
According to the media, the world is fundamentally at peace unless there is a state of constant, all-against-all mayhem. So however disgusted you are by the riots you're seeing unfold on live TV, just remember -- it was mostly peaceful.
The level of desperation and repetition makes me think that the general public doesn't buy this crap. They can spin all they want, normal viewers understand that it's not a trivial problem -- reducing violence from 1% of the time to 0% -- but something far more serious -- preventing riots from breaking out in a major city for at least two nights in a row.
More and more, it's becoming clear that the media do not serve as propaganda, which implies some degree of effectiveness in manipulating public opinion. Nobody with half a brain believes that riots are mostly peaceful. Rather, their job is to provide rationalizations to their audience, who feel a gut-level need for reducing their cognitive dissonance about some important matter.
"Blacks rioting in another city -- uh oh, sounds like it could HELP TRUMP... quick, MSNBC, tell me why it's not really such a big deal after all. Aha, they're 'mostly peaceful' -- indeed. Ahhhh..."
Soothing the viewer's fragile ego, pumping them full of a topic they've got an addictive craving for, giving them ideological morphine when they've got a cognitive dissonance headache -- the media are more of an informational pharmacy, and a shady sell-all one at that.
It's not to deny the propaganda role that they play, but most people already have their minds made up about most of the topics that they would sit through a story about. If you can't beat 'em, join 'em.