Before the schools had produced enough brainwashed Western students to provide for the Leftist takeover of Western governments, we had Marxist terrorist groups.
West Germany had the Baader-Meinhof Gang, known by its members as the Red Army Faction. Japan had the Japanese Red Army. Italy had the Italian Red Brigades.The switch from an actual guerrilla force to a department store-bombing terrorist organisation marked the change of the IRA to a Leftist ideology.
The most vicious and most radical Leftist group in the US was the Weather Underground, also known as the Weathermen.
Their campaign of bombings, murders, and robberies has gone largely unpunished. Bernardine Dohrn and her husband, Bill Ayers, are the most widely known members of a terror group. In the article at top, Dohrn is quoted on her opinion of herself, her comrades, and their actions:
“[Speaking of being underground to avoid prosecution] No, I think I was 11 years underground. It wasn’t exactly a punishment,” Dohrn responded to the question of whether she escaped punishment. “I do think we won the moral war and it was hard [for] the government to call us terrorists or criminals. Certainly they tried, but we were such a home-grown product — I grew up in the midwest of America [in] a family who voted Republican all their lives, and I was the first person in my family to go to college. That’s an American story.”