<Rudy Giuliani can hardly be held up to be an exemplary Catholic.>
Who said that Giuliani is an exemplary Catholic? I cited his statement precisely as an instance of anti-Catholicism in the presidential campaign.
Between them, Trump and three of his closest advisers (Giluiani, Gingrich and Bannon) brought twelve wives and an unknown number of girlfriends, mistresses and victims to the "family values" party.  Three of the four (all but Trump) are putatively Catholic. 
Giuliani's cavalier attitude about marital infidelity ("Everybody does it. I just tell my priest") represents a truly, viciously anti-Catholic attitude toward the Sacrament of Penance. My point was about the "firm purpose of amendment." The notion that "I just tell my priest" so that I can keep doing what I confessed reflects the lack of a firm purpose of amendment. In the case of a person who confesses a sex offense against a child, the confessor should construe the refusal to surrender as a lack of intention to stop.