Sin is sin

Because our civilization is indoctrinated into seeing anything religion does as being good even when it is objectively not. Even now, people are saying that it is the rapists who are bad and not the Catholic Church. Even though the Church builds up a society where children are forced to obey religious figures and are so scared of being tortured for all eternity that they won't say anything. And that's ignoring that the Church actively keep those rapists safe.