The atheist experience is not as pete said above.

The atheist experience is spending Sundays washing the car, nipping down the pub, eating without mumbling an incantation first. It is doing the pots, debugging the computer, debugging the dog, watching Top Gear on the telly. Its scratching your groin, breathing, going to bingo, getting your bunions sorted, doing a big shop in Tesco, putting the kettle on, popping down the chippie, buying a scratch card from the newsagent, giving the car its annual service, giving the missus her weekly service, ringing your relatives, having a hair cut, listening to good music, half listening to trashy radio, clearing the ashes from the log stove, opening a tin of beans. ...

That's the atheist experience.

It isn't wondering about creationism or science. It isn't trying to understand why some people feel smug about being er.. pious.

If some people do debate such things it is because they are interested in the subject, not because they may or may not believe in group delusion.