Creationism and the Holocaust

I like how athiests say that if you make an extraordinary claim (like that God exists) you have to have extraordinary claims to back it up. They say that books and writing isn't enough to prove this claim, because anybody could have just forged the Bible and just *claiming* to be an authority on the matter.

In 50 years from now, or a few hundred years from now, people believing that the holocaust happened, will face the same problem. They say that there's "mountains of evidence" to support this highly extraordinary claim, but with time, this mountain will be eroded into an amount of evidence no bigger than the Bible. Then people will point and laugh at the jews and their "fabled" extinction, going "Well, you're still *here*, aren't you? How do you explain *that*? I don't believe in your religious texts - I'm an atheist.".

>>1
The existence of a metaphysical being cannot be proved through any physical means, save for the supernatural. The average anti-atheist, or at least all that I've spoken to, dismiss any potential "miracles" right off the bat and still demand physical evidence, despite that any physical evidence would be "miraculous".

>>17
A better response to this line of thought is that religion or spirituality is the default position of mankind throughout its history, atheism is what's bucking the trend, or the "extraordinary claim".