The article raises an interesting point, but frankly I think the faith of the Church is in her teachings. The works of the Church, now those are another matter and I think the rightful place to question her.
The Church does not need to “prove” her faith in the way that an individual would according to NT teaching. The Church has the correct faith because she is the guardian and keeper of the teachings. She would never teach that pedophilia is OK, but she practiced it. So what is a parishioner to do? For starters, isolate what we see leaders in the Church teachings and what we see them doing. We can, if we must, view them as Jesus viewed the Pharisees but Jesus said to do what they say and not what they do. That means if you think the Church leaders do evil things, then just don’t be like them – but still listen to their teachings.
With the Internet and other communications available, plus the Catechism, we have tools that the rank-and-file Catholic never had in history to be able to ferret out those who teach contrary to the Lord, and for us to compare what we are taught so that the renegade or ill-formed Church official will teach it right.
I think Jesus made it clear that the Church authorities were to be listened to and obeyed even though they were constantly a target of his charges of hypocracy. Those are like two sides a coin; the priestly ministry where those in charge see that things are run properly, and the prophetic ministry where they call those in charge hypocrites when they enforce laws they don’t themselves obey and question whether people actually mean what they profess. Modern clergy have to play both roles, as well as tend to many worldly issues so again, when one wants to know the faith, the best idea is not to try to “be like” any Church officials, but to heed their teachings as if they were from God himself. Meanwhile, we need to be clever enough to use our resources to the extent we can to make sure that heresy is exposed and challenged.
Alan