Stalin attended seminary but became an avowed atheist.

Communism is an atheistic ideology.

I am not judging Stalin as non-Christian; he proclaimed himself as such.

Communism caused a great deal of the bloodshed of the 20th Century.

Therefore Atheistic ideology has been used in the same way as religious ideology.

Period; your obfuscation cannot disprove but only distract from these facts.

Atheism cannot claim moral superiority to any other system of belief. Period.