There is a big difference. Frist, there are outside sources (British, French, etc.) that corroborate American sources.
We don't have that when it comes to the Bible. The Bible "proves itself."
Second, no one is making etxraodinary claims about George Washington. No one is expected to believe that any of the sources about G.W. are necessarily inerrant, that he could perform extraordinary, supernatural acts, that it was God speaking to the author, etc. as is the case in the Bible.
The truth of the Bible is based on an a priori faith. As such it is "true" only to the believers, and it doesn't require proof (but that's not unique to the Bible, as I mentioned elsewhere; this is common to other revealed religions and their sacred books).
Because the Bible makes extraordinary claims, you'd need extraordinary evidence (proof) in order ot provie the Bible as "fact," and that is simply not there.
Kosta: Most Orthodox are firm believers. As such, the OT is "true" because they already believe it is true.
FK: I suppose those of us who think God commands us to share the faith with others need a little more than that as a reason for our faith Faith is not enough?
Faith is not enough?
Well, not usually in a witnessing situation, if it is blind and baseless. Why would anyone take that on? I mean, if a faith is blind and baseless and devoid of reason, then no argument can be made that it is any better than any other faith out there. For those of us who do the witnessing, that just doesn't cut it usually, especially in today's world. :)