How do you learn "clericalism"? As the Broadway show "South Pacific" said about human prejudice, "you've got to be carefully taught."
It's an attitude inculcated mostly in subtle ways, in little gestures and tainted language. It's absorbed in behavior and habits considered normal rather than aberrant, accepted as a natural way of life.
https://www.ncronline.org/news/accountability/ncr-today/immunize-priests-against-clericalism-start-seminaries
https://www.ncronline.org/news/accountability/ncr-today/immunize-priests-against-clericalism-start-seminaries