The competition as to whether atheists or theists murdered more people has already been run on HC and ended in a stalemate - both groups did their fair share of slaughtering.
Someone who doesn't believe in the existence of God raising his fist against God certainly doesn't make sense.
Remember that Stalin revived the Russian Orthodox Church for his own purposes so it is entirely creditable that he believed in the existence of God.
After Nazi Germany's attack on the Soviet Union in 1941, Joseph Stalin revived the Russian Orthodox Church to intensify patriotic support for the war effort. On September 4, 1943, Metropolitans Sergius, Alexy and Nikolay had a meeting with Stalin and received a permission to convene a council on September 8, 1943, which elected Sergius Patriarch of Moscow and all the Rus'. This is considered by some as violation of the XXX Apostolic canon, as no church hierarch could be consecrated by secular authorities.[22] A new patriarch was elected, theological schools were opened, and thousands of churches began to function. The Moscow Theological Academy Seminary, which had been closed since 1918, was re-opened.
Between 1945 and 1959 the official organization of the church was greatly expanded, although individual members of the clergy were occasionally arrested and exiled. The number of open churches reached 25,000. By 1957 about 22,000 Russian Orthodox churches had become active. But in 1959 Nikita Khrushchev initiated his own campaign against the Russian Orthodox Church and forced the closure of about 12,000 churches. By 1985 fewer than 7,000 churches remained active. Members of the church hierarchy were jailed or forced out, their places taken by docile clergy, many of whom had ties with the KGB. This decline was evident from the dramatic decay of many of the abandoned churches and monasteries that were previously common in even the smallest villages from the pre-revolutionary period.
