This is a debate that can barely be contained and kept civil under the very best of circumstances.
And really, in many ways, it can hardly take the form of a true debate. What one camp presents as evidence the other discards as spurious.
A hypothetical debate:
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"Christianity is the one true religion. Jesus is the only way to heaven."
How do you know that?
"The Bible says so."
How do you know the Bible is true?
"A lot of what The Bible says is historical fact, verified by other sources."
Well yes, but the same is true of, for instance, the film "Titanic". That doesn't mean that Rose or Jack ever really existed.
"Lots of people have believed in the Bible. Wise, respected, important people."
True, but also, lots of wise, respected people have disbelieved it.
"I believe it."
Obviously. I, however, don't.
"I know it's true."
Your saying that means nothing without further proof. I can just as easily, and I suspect with equal conviction, say that I know it's false.
"Christianity is centuries old; vast human efforts have been devoted to praising Jesus through song, art, architecture and word."
The same could be said of the ancient Egyptians' religion. Does that make it true too?
"You'll see. When we're both dead, then we'll see who's right."
There, at least, we agree.