I don't think the sexual frustation of adolescents is to blame. Many of the men these girls were procured for were mature and middle aged men.

This is just plain old non denominational bloody evil.

There are always perversions of religion - the priests in Frank McCourts childhood who slept with his mother for a few slices of bread.

There are always people who use their religion as an excuse to be an utter bastard. The headmasters who physically abused Roald Dahl. If they didn't have that as an excuse, they'd have something else.

Everybody knows when they're committing a monstrous evil.