Um, atheists really do not believe, as hard it is for you to grasp.
It may not make sense to you in your current life situation for other people to not believe in what you take for granted. But it happens, and just because you cannot aghree with us doesn't invalidate our lack of beliefs/beliefs.
I know ghost don't exist, santa, tooth fairy and many granny said content that I was fed as I grew up. You don't find me argueing against something that does not exsist nor others for that matter. What is the big boo haha over something you say doesn't exsist? If it doesn't exsist, then why fight so hard against it. It is because of the Truth deep within you that you know and the anger you have in that It doesn't respond to your tactics.