Comment 10 by Richard Dawkins

The Vatican is here simply upholding the vile doctrines that their church has always stood for. This was the church, and these were the vile doctrines, that Sister Farlwy bought into when she became a nun. If she disapproves of them, why did she become a nun in the first place? Why doesn't she get out now? Perhaps she has decided she can do the church more damage, and hasten its total destruction more effectively, by attacking from within rather than from outside? In that case I wish her well.

Richard

Wiki puts it like this:

Stockholm syndrome can be seen as a form of traumatic bonding, which does not necessarily require a hostage scenario, but which describes "strong emotional ties that develop between two persons where one person intermittently harasses, beats, threatens, abuses, or intimidates the other."