John_Mann - If evolution is the cause of our consciousness why it would create something totally unreal like the idea of God? The idea of God is the most pursued idea in human history as we still are talking about it now. Evolution "hates" waste, so why bring such enormous waste of energy in an unreal idea?
Your argument is flawed. You're saying that god must be real because evolution created our consciousness, which in turn created the idea of god. But because there is no reason for evolution to create something unreal, god must be real.
Firstly, the concept of god is not the product of evolution. Evolution "created" brains. Then humans created the concept of god, using their brains, in order to explain why and how they exist. It wasn't the evolution; it was us.
Secondly, evolution does not have intelligence. It can't create anything per se. Evolution is the process by which living organisms adapt to new environmental factors. Hence, the whole question "Why would evolution create something totally unreal like the idea of God?" is completely nonsensical. (Which is why evolution is also not responsible for what we do with our brains—see point #1 again.)
Thirdly, have you not heard of vestigial organs? Humans, and other species, have organs that we don't use. That don't do anything.
Fourthly, humans believe unreal things all the time—things other than god. One of the most important examples one can give is Scientology (since I don't think you're a Scientologist.)