Here's a page to help people explain why they aren't Christian. I've read several articles and watched some documentaries about the same subject. This one's not bad, but it kinda sounds like a Buddhist looking for random reasons to slam Christians... but yea, it brings up some good points:
http://www.uq.net.au/slsoc/bsq/budchr0.htm#cont
*on second thought, maybe it's not so good... it's so obvious the author is biased