Live trash can
Warlord
"Group together people deliberately chosen for strong religious feelings, and you have a practical guarantee of dark morbidities expressed in crime, perversion, and insanity."
My hunch is that it is problematic with guys who are dealing only with religion. It is much better with people who happen to have a strong religious feeling but it is not their profession. Better with philosophers, scientists, professors who have strong religious sentiment as leaders, than priests and clergy as leaders. Because these lasts groups attract people who are fond of power for power's sake.
Then again, there are exceptions including even these last groups: Tibet and ancient Egypt I think are exceptions.