"ive never read the athesist bible"
Probably because there is no such thing. There is only one thing all atheists believe, which is that there is no God. Other than that, there is no belief system or moral code that all atheists follow.
"i know they do not believe in GOD (or say they dont)"
I've heard of God, but what does GOD stand for?
"i feel however that they really do believe and know there is A GOD."
No, I really don't. I've actually tried because I felt at some point in my life I might be happier with religion, but I just couldn't believe in such a silly thing. I might find some spiritual belief that works out for me, but I don't think I can ever believe an all-powerful diety is out there watching my every move. Sorry.
"else why are they fighting against HIM so much, if HE is not real then they are only shadow boxing so to speak."
We're not. Please learn the difference between "fighting God" and "thinking fundies are idiots."
By the way, it's rather ironic that this post, which contains almost no facts whatsoever, was posted on a site called "FACTnet."