Stalin killed the most people, and it made little difference to him what ethnic or religious background they had. He was paranoid and was determined to purge everyone he perceived as being an enemy...
He definatly was.
Mussolini was the dictator of Italy until he was shot during the 2nd world War and hung up by his heels.
He was a big part of World War II and was part of the Axis Powers.
Atheist