Rearranging the letters of 'Roman Catholicism' gives:
A comical mirth son.
(by Harshal Madhavapeddi by hand) (2010) (pending approval)
O, it claims monarch.
(by Harshal Madhavapeddi by hand) (2010) (pending approval)
Criminal homo acts.
(by Judson T. Pewther using Anagram Genius) (2009) (pending approval)
Iconoclasm! Harm it!
(by Mick Tully using Anagram Genius) (2009) (pending approval)
Other related anagrams without their own page:
"Catholicism" -> "Comical shit." (by Joe Fathallah) (2002)
"A Catholic Priest" -> "Ethical? O, it's crap." (by Rick Rothstein using Anagram Genius) (2002)
"A Catholic Priest" -> "Pat each clitoris." (by Rick Rothstein using Anagram Genius) (2002)
"A Catholic Priest" -> "Chap's tail...erotic?" (by Rick Rothstein using Anagram Genius) (2002)
"A Catholic Priest" -> "It's halo practice!" (by Mick Tully using Anagram Genius) (2002)
"A Catholic Priest" -> "O! It's ethical crap." (by Rick Rothstein using Anagram Genius) (2002)
"Tony Blair is converting to the Roman Catholic faith" -> "His Act of Contrition morally bothering the Vatican?" (by David Bourke using Anagram Genius) (2007)
"The Holy Roman Catholic Church" -> "Healthy Catholic Church Moron." (by Rebecca Glantz using Anagram Genius) (2006) (pending approval)
"Christian" -> "Rich at sin." (by Joe Fathallah by hand) (2002)
"Christian" -> "Rich saint." (by unknown by hand)
"Christian" -> "INRI, chats." (by Debra Dee Freeman by hand) (2015) (pending approval)
"Christian" -> "Tan is rich." (by dani_j by hand) (2006) (pending approval)
"The Christian Church" -> "Ah, the rich rich c**ts." (by Joe Fathallah) (2002)