I guess this group are an example of far left extremists in the US: https://en.wikipedia.org/wiki/Antifa_(United_States) https://en.wikipedia.org/wiki/Antifa_(U

I guess this group are an example of far left extremists in the US: https://en.wikipedia.org/wiki/Antifa_(United_States) https://en.wikipedia.org/wiki/Antifa_(United_States) "They engage in violent protest tactics, which has included property damage and physical violence. They tend to be anti-capitalist and they are predominantly far-left and militant left, which includes anarchists, communists and socialists... Scott Crow, described by CNN as 'a longtime Antifa organizer', argues that destroying property is not a form of violence. The groups have been associated with physical violence in public against police and against people whose political views its activists deem repugnant. Antifa activists used clubs and dyed liquids against the white supremacists in Charlottesville and caused property damage. In one incident, an apparent antifa supporter punched white supremacist Richard Spencer in the face as he was giving an impromptu street interview and on another occasion, in Berkeley, it was reported that some threw Molotov cocktails." EDIT: And, if you're looking for individuals, these fine folks from the FBI most wanted domestic terrorists: https://www.fbi.gov/wanted/dt/donna-joan-borup https://www.fbi.gov/wanted/dt/donna-joan-borup https://www.fbi.gov/wanted/dt/elizabeth-anna-duke https://www.fbi.gov/wanted/dt/elizabeth-anna-duke