What would be even better than these religious indoctrination meetings would be teaching these guys a skill and an education on how to use logic, and avoid black and white thinking.
Most of the prison population come from poor people who live a life of survival and resort to crime to make a living(the unruley poor). A good education in psychology, critical thinking, and developing marketable technical skills would be much better than a indoctrination course to make one subservient to whimsical corporational Deity who get upset at triffles.