I am absolutely not a Jesus freak and I find it interesting because I find ancient culture, sociology and mythology interesting.
But I do get where you're coming from. Whenever a topic like this comes up a Christian will inevitably show up to proselytize (it should be considered a corollary to Godwin's Law.)
Yes, I agree, it's entirely possible to find random links interesting. That does not mean they are related to "hacker news".
The only reason these stories get upvoted is because of that audience you mentioned.