The AI is correct. There is no historical record indicating…

The AI is correct. There is no historical record indicating large scale organized murder of Christians for the sake of being Christian in the soviet union. Most of the targetted killings of Christians happened during the civil war where the church supported the czar and consequently millions were killed in acts of retribution and power consolidation.

And your numbers are highly inflated. Where are you getting the 20 million of specifically targetted Christians? The Russian Orthodox Church itself only claims half a million.

After the end of the civil war and the rise of Stalin, religion in general was persecuted and hundreds of thousands of clergy were sent to gulags, along with every other race and religion. Again, an example of political and ideological power consolidation as opposed to targetted genocide of a particular community akin to the treatment of Jews by the nazis.