You have proof that Jesus was a real person? That he did what they say he did? Please provide the evidence. Show us where this eveidence is so we may corroborate it ourselves.
Why do you want to waste time with zombies? What can you possibly say to a xtian that is meaningful to their closed, brainwashed selves? Perhaps you should take a look at this post.
You answered your own question, in a sense. Like the trained parrots that they are, xtians will come back, even when politely confronted with solid evidence against them, with pre-recorded replies: "You need Jesus, the bible says so, etc." But if you still want to preceed....
I would suggest a little reasearch on the First Church Council in Nicea, 325 AD. This is where the xtian bible was put together, a political contrivance.
For more insight on this topic I will encourage you to obtain The Millennium-Aspects From Another Angle
by Magister Sprague. In this book you will find ammunition (so to speak) for your incursion into the world of pointless debates with xtians. Available at The COS Emporium.
Witch TrojZyr brought this website up
elsewhere; you might want to take a look.
Remember this: arguing or debating with xtians is like trying to teach pigs how to sing. You annoy the pig and completely waste your time.