I think one of the hallmarks of atheism is the quest for knowledge.
That’s a very broad, generalized statement, so let me explain. Atheists, at least the ones I know from the atheosphere and the internet, spend a considerable amount of time studying, parsing, analyzing and generally commenting on religion, and all of its aspects in our culture. We try to understand the subject, and I think we have a very good grasp of religious dogma, or at least enough to discuss it; we know our Bible, and there are many among us that can cite chapter and verse. We are able to discuss intelligently most facets of religious life, from the notion that the United States is a Christian nation, to the effects of religious mindsets on our culture, politics and sexuality.