If you can doubt your own truth that claims absoluteness, how can you call it truth?
Honestly, all philosophy aside, this is pretty ignorant. Perhaps the 'atheists' you know are numbered to one, Dawkin, and you've created a MASSIVE stereotype because of it.
Honestly, that statement has made me more angry then any other statement I've heard about atheism yet.
If I call your religion completely immoral, contradictory, and stupid, and claim that all theists are wrathful extremists who hate anyone that believes differently, and they get angry, then in a sense I am causing my own delusion.
Edit: Read on and saw your not so bad. Okay, I have no PROBLEM with people having irrational beliefs, as long as they don't cause you to perform actions I consider immoral. For example, if any Jew or Christian decided to follow like, half of the old testament, they would run around murdering gays and women who are not virgins that marry, which I consider immoral. This is where a problem starts. If your belief violates the freedom of another in any way, there's gonna be problems.
Otherwise, do what you must to keep your morality and happiness, it does not concern me.