Ok, sorry, I was in a hurry and the expression "God is in the brain" was wrong. What I meant to say was that the idea of god, its perception resides in our brain. Is human nature.

But yes, religion is a man made thing in my opinion. There are all right in some ways and wrong in others. Guess I stick to mine because of my background and education and the fact that it works just fine with me, but that doesn't make it righter than others.