Have a response to these few I could list?
(Too many to post, WC limited)
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Boston Police Protected Far-Right Rally-Goers, Clashed with Black Counter Protesters

Man arrested for sucker punch of black Trump supporter at Laguna Beach, August 24, 2107

Protest poop: San Francisco activists plan to confront right-wing rally, August 25, 2017 

Boston- PHOTO: Protesters face off with riot police escorting conservative activists. Aug 20, 2017

Massive counterprotest upstages Boston 'free speech rally

In February, a scheduled appearance by conservative provocateur Milo Yiannopoulos was canceled amid a violent protest at UC Berkeley, Apr 15, 2017

June 26, 2016 - Protesters attack neo-Nazi rally members in California

And so on.