The entire episode was based on a red herring: it ridiculed teachings on sexuality that are not those of the Catholic Church, yet attributed them to it. This is more tired than clever.
The theme, as always, was about sex, and that is because Dan Savage, upon whose life the show is based, has been in a perpetual rage against Catholicism ever since he learned that he was sexually attracted to males.
The episode trashed Grandma Agnes. And why not? After all, the elderly are a good foil and easy to mock. Along the way, the Holy Spirit was ridiculed and Holy Communion and Confession were belittled. Par for the course.
The show is collapsing.
Contact Ben Sherwood at Disney-ABC: firstname.lastname@example.org