Prevalence Of Hate And Extremist Groups In California Chris Remington Tuesday, August 15, 2017 | Sacramento, CA Listen / download audio Update RequiredTo play audio, update browser or Flash plugin. David Brown, of Plymouth, Mass., holds a placard during a protest Sunday in Plymouth. The protest was held to denounce hatred and racism in response to a nationalist rally that spiraled into deadly violence in Charlottesville, Va., on Saturday.Steven Senne / AP In the wake of violence and unrest in Charlottesville, Virginia, residents in Northern California and Nevada are wondering if this could happen here. Professor Brian Levin, the director of the Center For The Study Of Hate & Extremism at CSU San Bernardino, joins to talk about his research and the prevalence of extremist hate groups in California. Also, the Southern Poverty Law Center published a map tracking the 917 documented hate groups in the U.S.