I've given up on arguing with religious people about religion, because it's a waste of my time. I made that decision quite a while ago. I didn't figure out all on my own that it was a waste of time. There are many very important things I know because wise people told them to me. In this case it was Nietzsche.
But today it occurs to me that I have been wasting my time on another large group of people: those who attack the Bible on specious grounds having to do with textual transmission, claiming that the King James Version is a translation of a translation of a translation of a translation, or that Roman Emperors had Biblical texts edited to suit their political ends, or that used to be hundreds of Gospels. You know the type, if you've participated in a lot of discussions of how the Bible came down to us and reached its present form. (You may BE one of those people.)
It's usually atheists who raise these and other inaccurate objections to the text of the Bible. But not always: there are those who might be described as Ur-Christians, people who believe that Christianity was impure even before it reached the stage of being written down in the New Testament. They may believe in a Q source for Matthew and Luke, which no-one has ever seen. There are angry Protestants who think that Catholics have greatly altered the Bible. (There are a few angry Catholics who think that the Vulgate is just fine and that the King James Version is a mess.) What these people and others have in common is that they object to the current Bible on the grounds that it is not the original Bible, that the text has been corrupted.
To be sure, they can't SHOW you very many examples of this corruption. If challenged to do so they'll typically take off on a non-sequitur tangent. If pressed, they might assert that the entire Christian concept of the Virgin Birth is a linguistic error, because the term for "young girl" was mistakenly changed to the term for "virgin." Actually, virgin birth is one of many concepts integral to Christianity which are not original to Christianity. The many alleged errors and/or deliberate changes in the Biblical text are typically part of a narrative repeated at second or third hand. A mythology, asserted without evidence just as religious mythology is asserted without evidence.
If you take the trouble to go back to the written sources of early Christianity, you will see the record of the very opposite of the alleged willful alteration of Holy Scripture. You see an immense effort on all sides to identify and faithfully preserve the earliest and purest written records of Christ and of the Church. Immense, and I think actually successful: the "other" Gospels, that of Thomas, of Judas, of Mary Magdalene, all seem to have been written significantly later than the four which were eventually included in the Christian canon, in the late 2nd century AD, when Irenaeus was referring to Matthew, Mark, Luke and John as the original accounts of Jesus' life.
And I think they are actually the closest to original accounts of all the known Scripture and would-be Scripture, of all the Bible and all the known apochrypha. Perhaps the atheists and others who constantly cry corruption cannot conceive that Christians as early as Irenaeus could A) honestly want to find the most original documents pertaining to the life and teachings of Jesus, and B) actually succeed in the attempt to identify the most original such documents in existence. All through the history of Christianity, countless scholars have vied with each other to transmit these documents faithfully, and to translate them accurately, and ever more accurately. (I don't mean to diminish the huge contribution made by Jewish scholars in preserving the Old Testament, beginning who knows how many century BC. It's just that this whole meshuggah discussion of Biblical texts being intentionally corrupted seems to center around Christians and ex-Christians and people who are angry specifically at Christianity.) Those who allege intentional corruption have got nothing, it's just as simple as that. They're repeating a political talking point, they are not familiar with the relevant source documents. Just like religious believers, their point of departure is the evidence of things not seen.
And it's futile to argue with people like that. They're not open to arguments, whether they believe in the content of the Holy Scriptures under discussion, or in the currently popular myth of that content having been intentionally altered any time after, say, AD 150. Earlier than that, there's very little historical record to tell us anything about the content of the New Testament or people's attitudes toward it. But there are scraps of papyrus with fragment New Testament texts from around that time -- not the texts themselves, but copies of the texts actually written down in the 2nd century AD. Smoking guns which could prove that someone later altered them extensively. They prove the opposite.
So -- goodbye to all of that nonsense. The search continues for sensible discussion partners to add to the few I already have.