All the canons of historical truth and methods of research that we have now weren't in place millenia ago when the Bible and Koran were written, so it's not surprising that those texts may not conform entirely to modern scientific or scholarly standards of what is proven or true. It's probably a mistake to think that any religion is more vulnerable than others to such criticism.
Just as the practice of most modern American religions have more in common with each other than with what such faiths were centuries or millennia ago, so ancient Near East religions probably had more in common with each other than we once realized. There were more connections and cross-currents and shared influences than subsequent generations would admit.
This certainly isn't the end of religion. The search for meaning and answers to the ultimate questions goes on, and any archaelogical evidence for anything in the Bible will be taken as evidence for the whole. But it may mean a shift in how we think about religion. There may be a good side to this, as we come to temper some of the claims we make for religion. There will also be a bad side. The great crimes of the last century have been attributed to the decline of religion. If people cease to be bound by religious constraints, will they commit similar crimes?
The hundred and fifty year old cliche about the great Kulturkampf between modernism and the dark forces of fundamentalism that was given new life by 911 may turn out not to be true. The challenge of the 21st century may be finding something true to believe in, not in overcoming belief. So will we perish from lack of faith or will monsters be unleashed by the perversion or decline of religion?
A good question.
If my own id were a template, I would say no.
However, it has become more apparent to me over the years, that there is a number of people who would do evil were they not constrained by the thought of eternal punishment.
The better question may be, how many?