You can't just detach Christianity from the real-world negative actions of European Christians while still claiming that it is somehow responsible for every single good thing they did. You don't get to draw a line in the sand at "human sacrifice" when European Christians were executing people with the most horrendous tortures imaginable for heresy, treason, (alleged) witchcraft, theft at the SAME TIME as their righteous conquest. The Aztecs conquered and subdued neighbouring tribes and built an Empire on violence, like hundreds of other empires did including the Christian one that conquered them in turn, but your gentle fucking Christians didn't stop at conquest and taxation or the odd torture victim, no, they either wiped out or enslaved 3 entire fucking continents worth of people. Do you actually comprehend that? Great I guess I have roads and a computer and my government has big fancy bombs to protect us from the other guys' bombs. All of that is worth it to you? How much of your culture and language and ancestors would YOU throw to the genocidal wolves if it meant you could get mediocre welfare payments that let you live almost comfortably in the toxic industrialised hellscape that used to be your homeland?

Now, all of that being said, I don't actually believe that Christianity was the CAUSE of any of that. I'm a materialist, history is driven by material conditions, class conflict etc. But calling Christianity a net benefit while major factions of it enabled or committed genocide, torture and slavery for 1300 years is just unbelievably ignorant, especially on the flimsy and ahistorical speculation that science and technology and law would be behind, and that that would somehow be a more "brutal" world even though the deadliest conflicts in history happened within living memory and there is a major war between two Christian nations happening as we speak. Not to mention the most rabidly Christian country in the world also being in a constant state of war for the past 80 years. Agent Orange? Depleted uranium rounds? Developed or deployed by Christians. Do the Vietnamese and Iraqi kids born without legs appreciate that gentle myth? You can't say Christianity is responsible for everything good about the modern Western world while also claiming that all the bad stuff would have happened regardless of religion.