I am was basing the statement on the body count. One has to calculate that Stalin used his own people as mere cannon fodder and how many others he starved or murdered in his domestic concentration camps. Also, Russia probably sponsored the Anfifa in Spain during the Spanish Civil War. Spanish sources say that the label applied to the communist-dominated Antifa in Spain was "nun-rapers." Communists are evil.
Notice that the American Antifa, probably communist leaning to a man, is not against Islamofascism. Nor is the Antifa against Communism. The Confederacy was defeated in 1865--they were all Democrats; Hitler defeated the murderous German Antifa in 1933 when he became Chancellor so that the Russian controlled-Antifa all would have been murdered or driven underground in Germany; the Spanish Antifa would have been defeated by Franco in 1939; and the German communists would have grabbed Eastern Germany in 1945 until 1990. The American Antifa is fighting forces previously defeated militarily.
It would be interesting to see what role, if any, Soros, who was a Hitler youth and Nazi Collaborator, played in establishing the American Antifa, which a petition is asking that the White House to label as a terrorist organization.
Years ago when the American Nazi Party marched in Jewish Skokie, a Chicago suburb, it was done peacefully under the auspices of local police authority. An upper-middle class suburb like Skokie would not want the vicious American Antifa around today in my opinion. The Antifa needs Democrat elected officials who will look the other way and give them space to destroy in order to unleash their particular brand of brutal terrorism.