There is no radical left in the United States, period.
Our worst protest was overblown by the right as the Stonewall Riots or something. It really WAS mostly peaceful protests. Compare Black Lives Matter or Antifa to uprising in the same year or two. It was social unrest for REFORM WITHIN THE CURRENT SYSTEM, not REGIME CHANGE.
And what's so radical about speaking your mind about things that affect you and your community directly? I can't think of a more anti-radical position than argumentation.
And what else is this radical left doing? Buying comic book with lgbt representation? Seeing movies with a black actor replacing a white comic book character? Changes done by businessmen to sell a product? In other words, bog standard consumerism?
Such a radical concept!
I dunno, show me this radical left, because I sure can't seem to find them.