Of course atheism is a belief. You believe that there's no God. So how can you say it isn't a belief??
And instead of doing a good faith investigation into whether God exists and what he demands from us you do nothing.
Not only that, atheism is a religion. It answers all the questions: How did we get here? We evolved. What happens to us when we die? We rot. Does life have meaning? No. Are there absolutes? No.
Atheists would say that there's no reason to help someone else if we didn't care about them personally because the joy you get from giving is simply a brain hormone that evolved to further the survival of the species. Ayn Rand was perfectly happy to let people starve in the streets.
In fact every religion that isn't based on the God of the Bible is perfectly happy to let children starve in the streets. They claim to think that the child did something bad in a previous life and is suffering for it now. It wasn't until Christian missionaries went to third world countries and helped them that some people from other religions went and did the same so they didn't lose members.
The most vocal atheists are those that hate God with a passion. Nobody hates the tooth fairy or Santa Claus. So how do they hate God when they claim he doesn't exist? It's simple. They hate God because they don't like the way he runs his universe. Or because of something that happened to them. So they deny his existence. The good thing is that so many of them are so obnoxious that they turn off people they could "convert".
I think that a lot of so-called atheists look at the evidence for God and decide that they'd have to give up their sexual sins if they believed in God so they refuse to believe.
RE: A little article I wrote about why Atheism is not a belief