It has been said by many Christians that one of the primary reasons for someone being an atheist and saying that they don't believe is because they don't want to believe. They don't want to ask the hard question "What if I'm wrong?" because they can't accept the implications of that questioning. They claim that we as atheists take the easy way out but I argue that it is just the opposite. Christians downright refuse to humor any kind of questioning when it comes to their belief. They refuse to look inside themselves and ask "What if there is no God?" because they are terrified of the implications of that question. They claim we are afraid of hell but in fact it is they who are afraid of oblivion. Of nonexistence. Understandably so. The idea of ceasing to exist is unpleasant to say the least. That is why being an atheist is far from the easy way out.
As an atheist you look that unpleasant reality in the face, swallow your fear and accept it and live your life to its fullest. Being a Christian is a way of ignoring the fact that the world is an unpleasant and often unjust place where some people live their whole lives in despair before their flame of consciousness goes out forever. This world can be cruel and unfair but as atheists we accept that it's the only one we are ever going to get and that motivates us to fight our hardest to make it a better and brighter one. For our sake and for the sake of our children. We don't turn away from reality and turn a wishful eye to an afterlife that isn't going to happen.
Faith was born out of desire to understand. "Out of fear" may be the same thing. At the dawn of history, man asked, why does the sun rise and fall in the sky, what is lightning, what is fire, why does it snow, who are the boogie men over the mountain, etc.... Long before science and enlightenment, deity was invented to explain the theretofore unexplained. Not knowing any different, faith was born.
Religion came later by men who desired control.
Atheism came much, much later. Nothing wrong with atheism, in my opinion, up to the point they ridicule and demean, because they too often misunderstand or ignore the great values that have also been born from our history of faith.