What sort of proof are you looking for?
How about the countless people tortured and killed for the sake Christianity (Islam, Judaism, etc)? This goes both ways. There has been harm done by Christians (Moslems, Jews, etc) to others and there has been harm done to Christians (Moslems, Jews, etc) by others. None of those people would have suffered their fate if Christianity (Islam, Judaism, etc) did not exist.
(What is Luvit's test?)
That's not a function of religion, but a function of lust for power. People who want control over others will misuse whatever tool is handy to do it. When Christianity is most powerful, the powermongers will use (or misuse) Christianity. When Marxism is power, they will use that.
If there were no religion, there would still be torture. There would just be other rationalizations for it.
Is what you said. This asserts that the religions 'good works' were over shadowed by the 'bad stuff'.