There are plenty of actual evidences and atrocities in the bible to debunk it based on its own merit.
I am an atheist and what I hate about religion is being toyed with here, misinformation. If you truly want to get your information out it is best not to be found spreading misinformation ourselves. The facts are already on our side.
Such as: Slavery, rape, infanticide, genocide, human sacrifice, thought crimes, invisible punishment, invisible reward, questionable morals, on and on
Regardless of science, we do not need it to be atheists. I am an atheist because of the lack of evidence FOR god. Not because science has proved god not to exist. This is a huge misconception from religious followers. Being atheist is not because science provided evidence, but because the religious has failed to.
Science explains the nature of the physical world; it is not in the business of debunking religion.
One of the examples of an atheistic argument against Christianity (or religion for that matter), one only has to look as far as a Christopher Hitchens debate on youtube. Look no farther to see a glaring difference in debating on scientific terms vs. debating on terms of lacking evidence for a claim or debunking those claims by way of reason and morals not science. The claim of atheism is disbelief because of lack of evidence. It is and should be looked at only as that. Atheism is not a religion or a field of science.
Atheism is justified doubt because of lack of evidence. Nothing more and nothing less. Atheism is about spreading facts and information. The people we talk to may be interested in what we have to say so speak the truth. Not misinformation, that is what they do and should be the glaring difference between the two.