I can’t wait for you to No True Scotsman away all of those Christians

I've already explained that people are inherently sinful and capable of committing atrocities when they don't follow Christ's teachings so I'm not going to readdress this point.

you’ll also have to credit the Holocaust, which was supported by a large number of German Christians, both Catholic and Protestant, who accepted the idea that their God wanted all the Jews dead

I don't have to accept anything much less that their hypothetical exegesis has no grounds in any of the church fathers or even modern theological opinion. Any Christian undertone in National Socialism was exactly that, an undertone. The Nazis leveraged any social identity that wasn't nailed down and arced it towards a human agenda in this world. That's not Christianity. That's something else. If you disagree find the passage in the NT where Jesus says Christians should kill all Jews.

More importantly who defeated Hitler? Christians. In large part it was Orthodox Christians from Russia who were being terrorized by an atheist communist regime at home that was murdering their clergy, destroying churches, throwing their citizens in gulags and starving their population to death. They were forced into the battlefield, often without even a rifle, to fight the Germans and they succeeded. Europe has had 70+ years of relative peace since then.

He also says to follow all of the abhorrent Old Testament laws. That’s what the “not one jot or tittle” passage is about.

Wrong. Christians are bound by ten commandments and the other moral teachings but circumcision is no longer required, the Sabbath day was changed, dietary laws were relaxed to the point of not existing and most importantly salvation was extended to the gentiles and the brutal punishments of the Old Testament were done away with. Christians don't pass their sins to a chicken and slaughter it instead we confess our sins to one another and seek absolution at the foot of the cross.

Sin is a transgression against a specific god. Your god is not the god of the majority of the Earth’s population, so no, they are not inherently sinful just because you have declared them so and your And I have read the New Testament. You read it. Especially John 3:18 where Jesus condemns anyone in the world who doesn’t worship him to eternal torture.

Sin is sin and there is only one God the Father, God the Son and the Holy Spirit. I don't declare them as sinners, God does. You know that I'm going to say this since you've read New Testament. I'm Orthodox so we have a slightly different but much older, early Christian view of hell. Essentially hell and heaven are the same thing, an experience of God. For those that are sanctified the experience is heaven and for those that are not it is hell. Atheists always equate the heaven or hell debacle to some megalomania when in reality worshiping and serving God is objectively the best thing for man to do. It is the ultimate fulfillment of life on Earth to live in humility, generosity, compassion for fellow man and reverence before the Creator. Everything that is good flows from Him so by worshiping God in earnest man is capable of "Theosis" (e.g. partaking in the energies of God) To turn away from God is hell.