You write of "confusion". I wonder who is confused here.
"... particularly as some Catholics will be the victims of that abuse," you say
Or, perhaps, putting matters another way round, "... particularly as so many victims of that abuse [me, for instance] are now ex-Catholics." "Offensive", you say? Yes I'm offended.
Thing is, you see (or at least one thing is, anyway), it is the Catholic faith that underpinned the abuse, rather than just the individual believers/perpetrators or, indeed, the institution of the Catholic Church. Something very similar goes for religious wars and other historical (and contemporary) horrors.
Matthew 7:20, 'By their fruits shall ye know them.' No?
As for those of you who ask where we are to get our moral rules from now God is dead, I suggest, first, a reading of Plato's Euthyphro.
-- Check out the eponymous dilemma there, expressed by Leibniz a couple of millennia later, "It is generally agreed that whatever God wills is good and just. But there remains the question whether it is good and just because God wills it or whether God wills it because it is good and just; in other words, whether justice and goodness are arbitrary or whether they belong to the necessary and eternal truths about the nature of things."
Then? Well, if you are interested, read some Aristotle. Nichomachean Ethics a good place to start. Perhaps read some contemporary exponents of so-called 'Virtue Ethics', too; Rosalind Hursthouse is good, for instance (she has a nice piece in Stanford Encyclopedia). Or Philippa Foot, or ... oh, lots of people.
In short, you don't need Christianity or any other theism to be good; in fact history shows a commitment to theism is deleterious overall to its adherents as well as others.
tldr? ... (1) Christianity is a thoroughly bad thing; (2) theism cannot be the basis of an ethical life.