Atheism is still a religion. It's to BELIEVE that nothing was created by nothing and when we die nothing happens. The end.
Maybe Christians,Jews,Buddhist, Islamist,Heretics, and Zealots might be crazy to believe in something that sounds ridiculous but all religions have something in common that makes there life better than those who don't believe in something: They believe in hope. Maybe there isn't something waiting for us after we die. We will never know for sure but that idea of it gives people hope and therefore generally boosts the morale and self-value of a person who believes in this.
Also, It's probably better if people try to live a 'happy' life rather than everyone being emo. I would rather walk around thinking there is something after I die rather then just going around feeling depressed while telling people "uh, when you die nothing happens". ALSO, some people could argue that it's better to believe in something and not find it rather than to not believe and something and find it.