The people that did evil in name of religion didn't really care for christian teachings - they only used it as an excuse to commit attrocities - Crusades. Inquisition. Conquista. Stuff like that. However, base theachings of the Curch, ie. New Testament; don't support that.
That is an argument called "No True Scotsman", it's very well worn and all its flaws are exhaustively documented. It's not a good argument. Beyond that though, this
particular formulation of the argument is weak even by those standards.
The
usual claim by the NTS people is that Hitler wasn't a "true" Christian. And that when he said he was and always had been a Catholic, when he was having the pope as an honored guest at his own birthday parties, when he was having all the Jews and Atheists he could catch sent to murder camps and quoting Christian texts and Catholic dogma to support it - that all that was some sort of bizarre
ruse, and he was secretly an atheist in his heart the whole time. That's a completely insane viewpoint, and totally unsupported by any historical evidence or facts. But it's very hard to
disprove, because it relies on making shit up about the inner workings of a skull that has already been splattered on the wall of a bunker before
actual atheists (played in this case by Soviet troops) could capture it.
But you're elevating the stupid to a new level: that of claiming that
scripture doesn't support Christian atrocities. And that's a much weaker position. Because unlike the secret inner workings of Hitler's thought patterns,
scripture is something we can just fucking
look up. It's fucking written down, so when you claim that something
doesn't have scriptural backing, you can in fact be disproven. And rather easily at that.
Do you
really want to claim that the Bible
doesn't say that the followers of Jesus should not bring peace on Earth, but to bring a sword? Do you
really want to claim that the Bible
doesn't say that the followers of Jesus should burn the scrolls of non-believers? Do you
really want to claim that the Bible
doesn't say that Jesus wants the Earth kindled in flame? Do you
really want to claim that the Bible
doesn't tell the followers of Jesus to sell the clothes from their back to arm themselves with swords? Because if you want to pull that shit, we can go quote Mark, Acts, and Luke to show that you are dead fucking wrong.
"Just War Theory" is about as old as a Catholic doctrine can be, and it has been used successfully to justify everything from the Crusades to the annexation of Czechoslovakia. But beyond that, Catholic Christianity recognizes not only "Just War", but also "Bellum Sacrum" (Holy War), which is basically just like the Muslim concept of Jihad, with all the vileness that entails.
Basically, you've embarked upon a voyage of self-deception: making an argument you can't possibly win. You're trying to make the argument that the biblical passages that real groups really used to justify their Christian-inspired atrocities don't exist. But they obviously
do exist, because the people at the time found them in the book and wrote them down, and repeated them to each other and told future generations where to go looking for them. And now we have electronically searchable bibles, so we can find the passages that these people used to justify their actions and verify
in seconds that they really do say that.
-Username17