There's also the difference that with Abu Ghraib it seems pretty clear that what happened there was in line with a semi-covert official policy of terrorising and maltreating prisoners, and the problem was that it came to light because of clumsy local application.

What has happened in the church has been a culpable failure to identify and prevent abuse, and flawed efforts deal with it internally, together with institutional attempts to conceal such failures from the outside world, and from congregations.

..................

A possibly pedantic point. "You can't fight fire with fire" is what I'd call a very treacherous metaphor. When it comes to fighting actual fires, fire is often one of the most important tools that are used.