I think the existence of anarchist and communist/marxist/stalinist/whatever terrorism is pretty well established. Click through this list: https://en.wikipedi

I think the existence of anarchist and communist/marxist/stalinist/whatever terrorism is pretty well established. Click through this list: https://en.wikipedia.org/wiki/List_of_designated_terrorist_organizations https://en.wikipedia.org/wiki/List_of_designated_terrorist_o... Plenty of leftist terror groups there. And most of them are probably on twitter, too. I have very specific interests on twitter, so I know PKK is there. And they advocate for violence.