A study published last June, 2018 reportedly found that damage to the prefrontal cortex is linked to religious fundamentalism. The study suggests that any damage to vmPFC whether by physical trauma, alcohol, drugs, a physiological disorder or even genetics can lead to religious fundamentalism. I would postulate that a failure of the prefrontal cortex to properly develop during normal brain growth due to social conditioning may also lead to a similar result. Further, as we all pass through a developmental stage of growth of the prefrontal cortex, some of us may never reach the point of full development resulting in a life long adherence to "normal" religious beliefs. Others outgrow this stage and reach the point of accepting religion as human construct. This guy wouldn't adhere to any religion.