Question.

Why do you (if you do) argue/debate about religion?
(Be aware, this is about religion and individuals. Not it's effects on society (which I consider a fair topic of discussion (and quite relevant in society today), etc. I mean specifically whether or not person X's beliefs are valid.)

In a debate, one party attempts to convince the other that they're right by the use of facts and eloquent speech (Idealistically. Reality often fails to achieve such goals). The other party then rebuts their points, if they can, and does the same. It's an exchange based on facts. (Consider a debate about a rubbish tip. While a lot of people may have an opinion that it's bad, the fact is that a lot of people have this opinion. You wouldn't say a rubbish tip is 'bad' in the debate, you'd use the fact that a lot of people think so, and therefore in the best interests of society, it would be wise not to make one in the center of an urban area.)

To argue about religion is silly, then, as it's based on a lack of facts entirely. At the end of the day, it requires faith, aka, belief that there either is, or isn't a god. (You don't lack belief, you simply believe that there isn't a god if you're an atheist. To lack belief means that you have no opinion on a subject, as belief by definition means you hold a proposition to be true).

As a hypothetical atheist, you observe nothing, and say that there therefore is no god. Theists say that god is absent (You hear varying degrees. Some say that He is present in everything you do, imperceptibly, while others say otherwise. Lets agree that from a scientific perspective of an educated individual, it's unquantifiable) from physicality anyway (I'll consider miracles and those who believe they are acts of a higher power to be outliers for now), so the knowledge that there is nothing lends itself to both sides. Which side you choose depends on your belief.

Since this is true, as there are no facts that weigh in on either side in a definitive manner, why argue? From my point of view, there's no logical conclusion that can be reached in this way. It tends to pan out that there's "stuff science can't explain" (miracles) and "stuff theists can't explain" (evolution, bible disrepancies, etc, etc) and that's about as far as it goes.