Robert M. sent along a magazine from the 60s about witchcraft, with features about Anton LaVey and Aleister Crowley. (Tried to see whether any of the naked girls on the altar happened to be Susan Atkins; the examination was inconclusive.)
Robert also sent an authentic communist Lenin pin, a Russian language textbook, some Russian stamps, and a CD with "Back in the U.S.S.R." and "Moscow Disco."
So what do communism and Satanism have in common?
Don't know. You could ask Robert. Or you could ask the Reverend Richard Wurmbrand: