Most folks don't like to be told they're wrong...doesn't matter the subject...
But a more complicated answer would be that all humans alive today have evolved from genetic groups that formed around a unifying principle of a higher power. That "belief in a god" allowed those societies to unify in larger groups that gave their group an edge in a fight for survival. After a few generations, the "belief in a higher-power based on faith" became a genetic pre-disposition.
Those that adopted the "faith" survived and those that didn't were outcast as non-believers or killed by the larger and more unified group.
It's the result of the application of basic Pavlovian and Skinnerian conditioning principles applied over the centuries and generations to a genetically receptive population.
Witness that Religion was originally invented as a form of government and societal control...that's not disputable.
The Athiests, being the heretics, witches and outcasts that resisted being controlled, as a result became subject to being slaughtered, as the Catholics did for centuries and millennia, and as the Islamists are doing right now, even as we speak...convert or die will tend to make a true believer out of you right quick!
Now if the atheists/heretics could figure out how to collect taxes/tributes to a God that they say doesn't exist they might have a chance to prosper or just mere survival...well... anyone can see the intrinsic problem inherent in that scenario!
"Supernatural divinities are the primitive's answer to why the sun goes down at night..."
