What I don't understand, is why they do not do it more often, for former clergy members who are openly apostate.
I am not a Christian, and not Catholic, but it has always confounded me that observant Catholics would “suffer a witch” to live amongst them.
As a nominal “witch”, I consider it to be an evil act to work to undermine any organized church by fraudulently posing as a believing member, much less a leader, in any established congregation. If you don't believe in the teachings of the Catholic Church, don't join it, or if you later changed your mind, quit.