The ridicule is well deserved, because it represents a pattern of stigmatization of LGBTQ people by the Catholic Church in the United States, which is a powerful, fierce, well funded enemy of LGBTQ people. This story is just one very small example.
As to picking out out a teaching. The damn teaching says LGBTQ people are DEPRAVED. Fuck that. And fuck anyone, including you, who believes that is true. I WILL discriminate against that bigoted evil every day of the week. You don’t like that? Get ready to rumble, because good, decent people are grind your evil doctrines into the dirt.