They burned over 50,000 (!!) women in France alone in the 13th to 17th century - go watch the video of that pilot getting burned alive by those savages, again in the name of religion, and then imagine it with a women. Accused, beaten, tortured
"questioned", often raped, humiliated, degraded, starved, dehydrated, then led to a pyre and burned in front of her family, friends, and accusers.
Just for 10 minutes, I would like you to go back in time and watch an innocent woman being tortured and burned, watch her skin slough off, hear her screams and smell the burning human flesh, and then come back here and claim Christianity, or any religion, is necessary.
Most likely you'd throw up for hours, need therapy, have PTSD, and maybe rethink things. Imagine being her kid, watching your mother burn, being told you were the spawn of evil, hated and reviled all your (probably short) life, all so someone could take your few possessions in the name of religion.
Dude, I don't care what those scumbags have ever claimed they did. They also claimed to cure diseases they didn't cure, bring people back to life, win wars they didn't win, end droughts they didn't end, on and on. They basically take credit for everything good that happens, and kill or torture or lie to everyone else. Remember Abu Ghraib? That chaotic mess of a prison? That was the middle ages writ small. All caused by torturing devils who gained power by telling stories.
Communism is the same playbook. They all are. "Believe in this bullshit that has no proof or basis whatsoever because it sounds good, and surrender your mind and will to a greater power who will do all the deciding for you. "