there are easily and quickly 2 reasons

there are easily and quickly 2 reasons we talk about god...though we don’t believe in god, we certainly believe in christians. They’re everywhere, it seems. And while most of them are harmless, a number of them are annoying… or worse. Much worse. They bomb abortion clinics. They do their best to hinder the advancement of science and the arts. They elect candidates based not on their competency, but on whether “he prays” (and says so more often than his opponent). They try to interfere — and get laws to do it — in the sexual lives of consenting adults. They ban stem cell research and contraceptives, thus condemning millions around the world to disease and suffering, because of books written by primitive desert nomads thousands of years ago. So, yes, christians are a problem.

and

Wouldn’t you try to help someone descending into alcoholism? Wouldn’t you care if you saw someone destroying their lives because of booze? Well, in a way, religion is like alcoholism. It attacks the mind, the power of reasoning, it makes people believe in absurd things. It destroys lives – both of the alcoholic / believer, and often those of their family, too. So it’s natural that some of us care — even about strangers. We don’t think we’ll ever “unconvert” fundamentalists; by definition, they’ve long stopped thinking about their belief critically — indeed, they believe that doing so would be a sin. But some people may be at a “crossroads”, so to speak. They may believe simply because they’ve never thought about it; everyone around them believes unquestioningly, and they’ve never even heard of an alternative. So maybe an atheist can make a difference.