God is not recognized universally- not God with a big G. Christians and Muslims and Jews can't always even agree if they worship the same god.
Is Coyote God? Is Ganesh God?
Do you really think that the argument for belief in a 'god' is because more people believe in a god?
God is a term easily recognized here for discussion purposes. Personally I think the Native American designation of Great Spirit (some say more accurately defined as the Great Mystery) may be an even better depiction. Be that as it may, we are all talking about a Supreme Being (some will say Beings). That is why the Great Spirit/Mystery kind of says it all when people of different times and cultures can't seem to agree on a common description. If we all understood God as the Great Mystery, then the squabbling among religions wouldn't be over whether we recognize the same God--it would be over who best understands the mystery.
My argument is not over the number of believers, but the authenticity of people's experiences and interactions with God. There is also the question of if it takes a force to put an object in motion, what/who was the first to start motion? The Great Mystery, perhaps?
I think that most Christians would take an exception to the god of Jesus being lumped together with Ganesh- with Ganesh being called God.
Do I agree that humans have always found some supernatural explanation for the unknown? Sure.
Now we have UFO's.