I've studied this bunch over a long period. Living in the San Francisco Bay Area during the 1970s left an indelible impression of the totalitarian tactics these groups use almost reflexively. The only thing they understand is power.
My faith in American good sense faltered when I saw radical fascists like Angela Davis, Bill Ayers and Black Panther murderers welcomed into the academic and social elites. I've feared this time would eventually come because of voter apathy.
I lived in SF in the 70s, too. It still stuns me that Angela Davis, involved up to her eyebrows in that bloody Black Panther attack and kidnapping at the Marin County Courthouse, became the hero of the supposedly moderate left and ended up with a comfortable academic job. People like her rejected our legal system, the rule of law and our values, and they were rewarded with teaching positions so they could spread their poison.