Is belief in religion a choice of free will, or is it enviromentally/genetically inbuilt into our personality?

It is because we have been spoon fed god from our earliest memories. Babies are not born with a "made in heaven" stamp plastered on their s. We (you) believe in a god because your parents believe in god. They and the media make sure that you are surrounded by this fairy tale to the point where everyone is a soul dead christian zombie willing to bomb clinics and protest funerals all in the name of whatever god they are brainwashed into believing in.