What you need to know (essentially) is that atheists are not convinced there are any supernatural entities - Period. We are not necessarily closed to evidence in favor of the deity's existence, we just haven't seen it yet. An easy method to apply is to picture Greek polytheistic religions and you understand how we view other religions, including Christianity
Whoever fights monsters should see to it that in the process he does not become a monster. And if you gaze long enough into an abyss, the abyss will gaze back into you