1) Estimate a probability that the church hierarchy believes that God exists. You might say 99% ex ante.
2) Learn that thousands of members of this hierarchy committed heinous crimes (or allowed them to continue) in a manner that is directly contradictory to them actually believing that God exists.
Doesn't 2 have to change your estimate of 1? Although this certainly has no bearing directly on whether God exists, it is certainly understandable that these episodes have severely shaken the faith of millions and millions of people. And, really, that is another heinous crime by the church hierarchy that follows directly from the first one. What a mess.
Link: https://en.wikipedia.org/wiki/Bayesian_inference