Psychopathy is detectable on an MRI and involves morphological abnormalities in some specific regions. Like all neuropathologies, psychopathy falls on a spectrum.

A Systematic Literature Review of Neuroimaging of Psychopathic Traits.

Your implication about religiosity is that it can influence moral attitudes. But notice that many religious persons are immune to indoctrination regarding abortion, child genital mutilation, and the like, recognizing these issues as morally obvious. Why? Probably because they have the mental means to do so.