Atheism is sometimes (wrongly) referred to as a religion. As a matter of fact, atheism has nothing to do with religion. Some religions are theistic and some religions are atheistic, but atheism in itself is no more a religion than its opposite theism is.
Theism believes there is at least one god (whatever kind of god that may be), a-theism is just the belief that a specific defined god does not exist – there can be no general atheism, but merely specific versions directed against different theisms, like Christian atheism, Islamic atheism, Judaist atheism, Hindu atheism etc – since atheism always needs at least one god that it can claim not to believe in. Atheism is always, you see, nothing beyond a pure negation.
Actually, it is a miracle that anybody cares about atheism in the first place since it delivers no worldview of its own. It is nothing but a constantly repeated I am still not sure what I believe in, but at least I do not believe in that! Atheism can in itself not define anything it actually does believe in. It is an empty hole, an intellectual dead end.
Historically, atheists have therefore always been forced to define at least something in addition to atheism, which they can claim they do believe in. The most common reponse is that atheists stick to humanism, they believe that there are people and these people are individuals and this is apparently of great metaphysical importance to them. So atheists end up believing in individualism where they can at least claim to believe in themselves.
The problem is that individuals exist no more than the so far defined gods. Just like nobody ever seems to have met God and can prove his or existence, nobody has ever met and can prove the existence of an individual. Sure, there are over seven billion people on this planet, and these people have bodies, but that these bodies also harbor individuals is no more proven than the existence of any external divinity. There is only the body, there is no individual inside the body. Rather people seem to be far more dividual than individual, split, chaotic and living with grand delusions of all kinds, rather than being unified, structured, and all-knowing.
Syntheism starts right here: Individualism is a dead end, science has proved that the feeling of being an individual is an illusion, literally a mindgame. So we can no longer be complacent with historical atheism. We have to move beyond atheism, into what we refer to as deep atheism or post-atheism. Please feel most welcome to join us. When both God and The Individual are dead, what can we do with whatever is left of metaphysics, if not create our own new gods which we really can believe in? Far more than we could ever believe in our limited and illusionary selves.