@XXSpadeMasterXX,
Faith, itself, can be proven. Simply look at all the religions that exist and have ever existed. That, however, is not what is in question. Faith is merely the belief in that which does not rest on logical proof or material evidence, this of course can be proven. What's not proven are the claims in which people have faith in, which is what is currently in question now. As I'm sure I've stated before, no amount of belief can make something a fact. While it's a fact that you may believe something to be true, it doesn't, in fact, make what you believe in true. So you can assert that you have faith in something, for that is provable, but you cannot assert that the claim you have faith in is true, unless of course it is provable as well.
As far as Christianity "surviving with scruitiny" for 2,000+ years, that's laughable at best. For 500-600 of those years anyone who so much as mumbled a bad thing about the church was burned to death or hung for heresy or some other ridiculous crap. Christianity has only survived through ignorance, denial, and arbitrary word games. If you count Atheism as a religion, it's the fastest growing religion in America all thanks to the internet. So it's really not a matter of Christianity surviving scrutiny, it's a matter of them hiding from it, and thanks to the internet, there's no where left to hide...except imagination land.