Half-Life. Atheists do not believe in God. I have easily accepted this about them... why are you having trouble with it?
What Atheists like to do is use their arguments to make it seem like you are contradicting yourself (which is very easy to do if you are not well trained in bible study)... or rather, that the bible contradicts itself.
It's not that they "say one thing and then say the opposite"... it's that they tolerate a supposition for the purpose of discussion... that is to say, there is a whole lot of "well, IF (big if) <insert Biblical claim> THEN.... <insert logical complaint>"
I see how this can get confusing... "How can God do xyz and also claim abc.." - You are just wasting everyone's time by saying, "AHA! you DO acknowledge god!!!" No they don;t... they are just giving you all the rope you need to hang your own poorly formed arguments from.
But my point is they do not believe in God because they looked around and said, "I can't see no God. Guess He's not real." This is the most intellectually dishonest position one can take. I am trying to explain why that position is wrong.
A lot of atheists make the claim, "God does not exist," which is a positive claim. But, when you ask them for proof God doesn't exist, we get crickets chirping. They claim there is no proof God doesn't exist. But, if there is no proof God doesn't exist, how does one come to the conclusion that God doesn't exist?
You see the problem? There is literally NOTHING you can point to and say, "That right there shows there's no God." Hopefully this gets some of you guys thinking.