Why do some peaceful protests stay peaceful while others devolve into violence, rioting and/or looting? Some experts say it's a toxic cocktail of historic repression turbocharged by acute police suppression. The uncomfortable truth is that riots aren't random outliers of human behavior; they're a direct result of historical injustice —and sometimes, they're the only things that truly change history.
» Subscribe to NBC News: http://nbcnews.to/SubscribeToNBC
» Watch more NBC video: http://bit.ly/MoreNBCNews

NBC News Digital is a collection of innovative and powerful news brands that deliver compelling, diverse and engaging news stories. NBC News Digital features NBCNews.com, MSNBC.com, TODAY.com, Nightly News, Meet the Press, Dateline, and the existing apps and digital extensions of these respective properties. We deliver the best in breaking news, live video coverage, original journalism and segments from your favorite NBC News Shows.

Connect with NBC News Online!
NBC News App: https://apps.nbcnews.com/mobile
Breaking News Alerts: https://link.nbcnews.com/join/5cj/breaking-news-signup?cid=sm_npd_nn_yt_bn-clip_190621
Visit NBCNews.Com: http://nbcnews.to/ReadNBC
Find NBC News on Facebook: http://nbcnews.to/LikeNBC
Follow NBC News on Twitter: http://nbcnews.to/FollowNBC
Follow NBC News on Instagram: http://nbcnews.to/InstaNBC

Repression, Suppression, Violence: How Protests Become Riots | NBC News