Actually, every Catholic bishop received a letter from then-Cardinal Joseph Ratzinger in 2001 specifically instructing them to keep child abuse investigations secret from secular authorities. So in this respect they did not “just happen” to act similarly; they were in fact instructed to act similarly, by a high-ranking Church official.
One would think that if they actually held the welfare of the abuse victims in mind, they would have shared information as quickly as possible with local authorities, rather than implementing a policy that, due to the statute of limitations, makes it nearly impossible for perpetrators to be held accountable by the law. (Ratzinger asserted that evidence should be kept confidential for 10 years after the victims had reached adulthood.)
Cite, in case you need one: Pope 'obstructed' sex abuse inquiry | World news | The Guardian
I feel that I should say here that when I left the church of my childhood, I did so only because I had stopped believing in God, and not because I felt that the Catholic church was inherently evil or whatever. I retained a lot of good, warm feelings towards the community of faith I’d been raised in. When the first news about the child abuse scandal started coming out, I assumed that it was a matter of isolated incidents, and that Catholic priests were taking a lot of media heat because, well, people like to bash on Catholicism. Then more and more reports started coming out, and it seemed that not only were these not rare and isolated incidents, but the Church had actively been working to keep the molesters from being caught, often moving them into new areas with new populations of kids to abuse. Maybe none of this came from the Pope himself; I don’t know. But enough of it came from high enough up in the chain that it’s just not defensible. This is an organization that claims divine authority; that says “suffer the little children to come unto Me”; it is supposed to be protecting and nurturing the children in its flock, not allowing predators to openly harm them, and then protecting those predators from any consequences.
I just can’t defend the Church’s actions anymore. The whole thing is a howling outrage, and I find it personally depressing (although not terribly surprising, I guess) that there are people who are still vigorously defending the RCC’s actions in this whole mess.
Anyway, I have no more time this weekend, and frankly not a lot more energy, for debate on this topic, so there’s my official statement, for what that’s worth.