"The common people" - typical meritocratic thinking, just as it's typical aristocratic thinking. Religion serves a purpose. Is that purpose a good one? It depends on the circumstances and the society. If you know anything about the Old Testament (I've never read it, but I know it), you'll know the Jews' God is a fucking prick. That's because the Jews, in that time, were out of control. They needed some goddamn rules, or they'd go crazy. The Roman Empire was falling apart, so the New Testament portrayed a God who's really, kind of a nice guy. The people needed cheering up, and some God who doesn't let a faithful guy in after 40 years won't cheer you up.
Atheists don't NEED religion. They have other ways to get guidance. Atheists are atheists for a reason. It's not like we became atheists on a bet. I don't believe in God, because I don't need it. If I need cheering up, I have other ways. Porno isn't made for the priests, now is it?
Which leads me to morals. Morals are relative in many atheists' opinions. Religion is entirely based on absolute morals: Right and wrong is right and wrong, and God decides it. Moral relativity states that in a society where murder is a rite of passage, such as ancient Sparta, than murder is morally right. In a society where giving birth to a girl is morally wrong, than giving birth to a girl is wrong.
In religion, believing in God is right, and it is right in every society. You MUST believe in God, or you are morally wrong. This is where religion and atheism, and, to a lesser degree, science, clash. Atheists are wrong, in some religious people's opinion, though atheists, at least the normal atheists among us (I disassociate with American Atheists), find that religious people may be incorrect, but they are not bad people. Now, I'm not trying to classify all religious people as mean to people like us. I have many religious friends, and I just don't argue with them because it is pointless for both of us.