Rather than pretending to be a know it all and miss out on the chance of gaining knowledge, it's better to inquire from people, atheist or otherwise, the things they know of and you don't. That way rather than having pompous "who has the biggest brain" type arguments, we can each benefit from the knowledge of one another.
On that note this thread has helped me gain much info about faiths and groups I had known very little about, so thank you to all those who provided me with this knowledge.