As an all inclusive total for Christian murder in the burning times forty million is probably close the mark.
All told, Christian murder from all sources could exceed a hundred million if enough research were put into the project. The Crusades, the Albigensians and the religious wars alone could come to a hundred million.
Christianity has always been the pimp of the ruling class in political domination. You really cannot separate politics and religion in European history. Everyone seems to want to give Christianity a break. Why? Christianity ,to me, is one long history of unmitigated evil. I had the misfortune to be born a Christian, but I overcame it. It is very difficult to get the Sunday School junk out of your psyche. Loyola put it best. "Give them to us for their first six years and we have them for life."
Six million Jews died under Hitler. What was the total death under Hitler? Who knows, but the grand total had to exceed a hundred million or more. How many collateral deaths were there in the burning times? There had to be millions more.
Children were dispossessed of their parents. Families were made destitute and treated as pariahs. Such people quickly die from disease , exposure and starvation. They burned Mum! That is a stigma that must have caused a lot of deaths. Peasants would see such people as they saw the Jews.
Historically, Christian forgiveness doctrine has been used to remove ruling classes fear of retribution. The Lord of the manor kills your father. The Priest says Our Lord told us to forgive everyone, my son! The Lord has nothing happen to him!
I wonder how often, the blade of an avenging son flashed in the night against a Priest? Probably few? Ignorance and diabolical induced fear worked very well.
I too, had lives in the fourteenth through seventeenth centuries. I escaped the Burnings. I had an Italian,Scottish and English life. Burgher , Soldier, Aristocrat and Virginian.