Church history. For one thing, many Papal elections, especially in the Renaissance, were won by bribery; for another, the behavior of some popes. Read the history of the Papacy in the 10th century, when a woman named Marozia ran things behind the scene, murdered some popes so she could dictate the election of others,including, if I remember rightly, her own son; or the Babylonian Captivity, when there were as many as three claimants to the Throne of Peter at the same time, and no one knew which, if any, was God’s choice. Renaissance popes appointed their “nephews” (i.e. children) as cardinals while they were teenagers, despoiled the treasury to provide for their families, poisoned rivals, and sold church offices routinely. The reason Tetzel was selling indulgences throughout Germany in 1517, which sparked the Reformation, was that Albert had to buy the privilege of being appointed Archbishop of Mainz from the Pope, who was raising funds to build St. Peter’s. It’s hard to believe God was responsible for the election of monsters like Benedict XI or Alexander VI.