Only Christianity? Why that particular belief system? Do you apply this to yourself? Have you explored all other belief systems as they really are? How much time have you spent meditating? Being open to revelation from Krishna? Or doing anything else you're asking me to do for just one religion? Hypocritical much?
Do you see what a nifty, self-confirming, circular system you've got here? Everyone who agrees with you is right. Everyone who doesn't is stubborn and unwilling to explore Christianity as it really is. Anyone can play this game. I'm not calling you a liar, just a delusional idiot unwilling to deal with reality as it really is. Fun, eh?
Here's your problem, toms. Let's say, just as a thought experiment, that I'm completely nuts. I suffer auditory and visual hallucinations that cause me to see space aliens all around us, and they're as real to me as everything else. Let's say I want to check if they're real or a hallucination, so I ask someone else, and they say they don't see anything. Well, I say to myself, the space aliens have controlled that person's brain so they're invisible to him. Or, they're in on the plot, and do see them, but are lying to me as part of their evil scheme. Or, they don't know how to look right and see what's really there. I now have created a neat system in which it is impossible for me to check whether what I'm seeing is real or just a hallucination. Sound familiar?