How can freedom of religion not include freedom from religion? To be free to practice my religion, I must be free from yours.
Stalin attended church - he even went to confession. Three times. Once during the Red Terror in 1937, once in 1941 when the Germans were racing over Russia, and once in 1950 only a few years before he died.
I don't suppose you have a reference for that? In the meantime, some light reading ... https://en.m.wikipedia.org/wiki/USSR_anti-religious_campaign_(1928–1941)
Um .... I beg your pardon? Is this the proper form from someone who has just seemingly pulled stories about Stalin attending confession from out of their asshole?
As Jesus said, "The measure you give is the measure you shall receive." Or, in current vernacular, "What goes round, comes round."