Who create God? Why there is always a confusion, misunderstanding and debates on the topic of God? Why do people want God? Isn't we are the one to make everything possible? We don't have to give our faith and hope to God. Isn't it ? Why God exists in all people mind? 
Do you really think that we can make everything possible? The fact that the idea of God exists in everyones head simply means there is indeed a supreme being higher than us. You could not teach them and you cant take it away from them. Even in the history of tribes and native people who were not yet exposed to different belief already erected some sort of images which they say represent God. Who told them the idea? No one. It was just there. Human instinct recognizing a more supreme being in their lives.