Hopefully this will help you understand the idea better:No matter how many times you repeat it. I reject the whole idea that there is such a thing as an absence of belief. I'm not budging on this. Atheism is a position, not a lack of one.
"Theism" refers to the range of positions that include belief in a god or gods.
"Atheism" refers to the range of positions made up of every position other than ones that fall within theism.
Every atheist who has a functioning mind holds all sorts of positions. Take me: I hold that, for instance, that the Earth orbits the sun and that golf is boring.
Nobody's saying that atheists hold no positions, or even that they don't hold any positions about gods. What we're saying is that any person who isn't a theist is an atheist, and there are countless belief systems that qualify as "not theism."
It's also worth remembering that there's a difference between rejecting an argument for a god and rejecting the god itself. Take this statement:
"Steve's arguments and justifications for God are irrational nonsense. He's a fool and an idiot for believing in it."
This statement doesn't speak at all to the question of whether Steve's God actually exists.