When did the original Left die?
It didn't not die at least in Europe; it just changed names. You should have been there watching the Baader-Meinhof Group (Red Army Faction), arms linked marching down the broad streets in German cities chanting - they were very scary; they engaged in a series of bombings, assassinations, kidnappings, bank robberies and shoot-outs with police over the course of three decades.
Watch our current crop of wannabes morph into something similar or worse.