"Is there a cliff note version without the ridiculously long names and titles?"
San Cristobal de las Casas is the name of a city in Mexico. It's also the name of the Diocese. No worse than Minneapolis-St. Paul Minnesota, I should think.
As for the Spanish surnames: they customarily use both father's and mother's family name. Ridiculous?
It's kinda like when the news people read one word in Spanish and over-pronounce it with a Spanish accent.
In Spain and Spanish cultures, the name of the father comes first, and then the mother's family name (the name of her father) comes afterwards to distinguish one "García" (the most common name in Spain) from another. The second last name is often abbreviated: Antonio García F., for Antonio García Fernández, for example.