Arrogant Protestant Ignorance On Parade
I'm not a Roman Catholic (more a Deist Methodist), but I would think this were offensive if it weren't so laughable. (Hat tip: Fr. Jim Tucker who found it at Ship of Fools' Fruitcake Zone).
On a related note, Belle Waring at Crooked Timber links to a wicked riff by Michael Berube on the Left Behind series.
(I have to be careful not to be too scathing as I know several otherwise smart and educated friends and colleagues who have read those stories and not only liked them, but found them to be spiritually meaningful. For a more fun story about the end times, I instead would recommend this latter-day Heinlein).