You have likely stumbled upon short clips from a 1985 interview of the KGB defector, Yuri Bezmenov, warning the American public of the KGB's psychological warfare operations against the United States and other democratic countries.
Chester M. Southam was an immunologist and oncologist who was caught injecting people with live cancer cells from the 1950s to 1960s. He went on to become the American Association for Cancer Research president.
Communist societies have directly resulted in millions of deaths. Inspired by Marxist-Leninism, Pol Pot and the Khmer Rouge rise to power led to the death of nearly a fourth of the Cambodian population.