It's significant that Father Rentería visits Pedro Páramo before attending the women who are waiting for him. This shows that he fully understands his hypocrisy and yet continues to go along with it. Like Pedro, Father Rentería does not fully appreciate the power he holds: when he tells Dorotea that her sins are unpardonable, she takes this to heart. As she earlier told Juan Preciado, she gave up all hope for heaven at this moment. And yet it’s also clear that Father Rentería is projecting his own guilt onto her: he tells her that her sins are unpardonable because, deep down, he feels unable to pardon himself. As a result, he unnecessarily destroys her. Similarly, when he leaves the rest of the women waiting, he ends up putting his own feelings before their needs. Like with Pedro Páramo, Father Rentería’s moral corruption inevitably spreads, causing more damage than he could have anticipated and even corrupting others.