Communism refers to an economic structure in which all means of production are held by the workers or working-class citizens (proletariat), but are governed by the government. The Red Brigades was a paramilitary group based in Italy and responsible for several reported crimes including kidnapping, robberies, and murders with the aim of achieving revolutionary proletariat.
During the time period 1939-1945 Churchill was the Prime Minster of Britain and he is mostly likely referring to the leader of Germany, Hitler because of his aggression and annexation of country's around him.
