Reply #14: Nope, no atheism for Stalin or Pol Pot even if they were marxist-leninists.

[humblebum]

The League of Militant Atheists comprised workers, peasants, students, and members of the intelligentsia. Organizations were founded at plants, factories, kolkhozes, and educational institutions. By early 1941, the league consisted of approximately 3.5 million working people of 100 nationalities. The number of groups reached 96,000. Guided by Leninist principles of antireligious propaganda and by the party’s decisions on these principles, the league dedicated itself to ideological struggle against all forms of religion and the development of a scientific world view among working people. It disseminated propaganda on the natural sciences and atheism, offered believers individual counseling, and trained propagandists and atheist agitators. It also published scientific and popular scientific works and a number of periodicals, founded museums and organized exhibitions, and conducted scientific research in the field of atheism and criticism of religion. Working under the motto “The struggle against religion is a struggle for socialism,” the league coordinated atheist propaganda with economic, political, and cultural tasks. The league maintained extensive international ties; it belonged to the International of Proletarian Freethinkers, and then to the World Union of Freethinkers. In 1947 the league turned over its tasks of disseminating scientific-atheist propaganda to Znanie (Knowledge), a newly created all-Union society.
REFERENCES
Konovalov, B. N. “Soiuz voinstvuiushchikh bezbozhnikov.” In the collection Voprosy nauchnogo ateizma, no. 4. Moscow, 1967.
Konovalov, B. N. K massovomu ateizmu. Moscow, 1974.

And of course no atheist outside of a communist country would consider themselves allied with those people.

Joseph McCabe- Is the Position of Atheism Growing Stronger? By Joseph McCabe (1936)
“No wonder they hated and libeled Russia! For the news is spreading, and is triumphing even over reactionary opposition that Russia is doing the finest and soundest reconstructive work of our time, and it is doing this, not only without God, but on a basis of militant Atheism.”