I don't think that the issue is so much whether or not one can "disprove" Christianity. I think that what seems to matter to most people is demonstrated by Clinton Hammond's astute observation -- Christianity cannot be empirically demonstrated.

It doesn't mean Christianity, or God, is not an objective reality (string theory cannot be empirically demonstrated -- but doubt it at your scientific credibility's peril!). It just means that, at least right now, the supernatural elements upon which Christianity have much foundation (beyond philosophy) cannot be duplicated or demonstrated in a laboratory.

They can be demonstrated in living -- but so can any philosophy.

It has always been interesting to me that the foundational text from which Christianity draws its reason for existance is repleat with supernatural demonstration.

"GILLIGANNNNNNNNN! Well, little buddy, look at the mess you've created now!"