Alexander VI, hmm, not one of our finest. In fact, I think he safely holds the place as the worst, most degenerate sinner to ever hold the place of the Vicar of Christ. Course, we are all sinners, he just was, completely unrepetant. Some of the stories are horid. The woman in Raphael's Masterpiece the transfiguration, Julia Farnese was one of his conquests I believe.
Alex6 is not one you'd willing grant ex-cathedra authority to.
What really strikes me with this is the time. It was late 1400's and early 1500's. This parallels the formative years of Martin Luther's life. By 1517 Luther had posted his theses on the door of Wittenberg about the buying and selling of forgiveness of sin by another pope of that era. No wonder many in the Reformation saw the pope as anti-christ.
Luther preached justification by faith. The times he lived in Justified the necessity for someone to Protest.
Were you his confessor? Most histories speak of his repenting when nearing death.