Brain Game: Glorious Rug Pies

Here are 12 anagrams with related solutions. If you solve one or two of them, you'll learn the theme, and the rest will likely come easier. Good luck!
AUNT RAISIN SPIT STAB DISC OF CIPHER LISTS DEVASTATED SHINY VENTS BRITNEY SPEARS THUDS BIDS PIANO SPECIALS HEWS HEAVEN'S JOISTS LEARN THUS EMINENT SON MISS THE DOT CAROL MACINTOSH
Here are the ANSWERS.
THE ANSWERS:
AUNT RAISIN = UNITARIANS
SPIT STAB = BAPTISTS
DISC OF CIPHER LISTS = DISCIPLES OF CHRIST
DEVASTATED SHINY VENTS = SEVENTH DAY ADVENTISTS
BRITNEY SPEARS = PRESBYTERIANS
THUDS BIDS = BUDDHISTS
PIANO SPECIALS = EPISCOPALIANS
HEWS HEAVEN'S JOISTS = JEHOVAH'S WITNESSES
LEARN THUS = LUTHERANS
EMINENT SON = MENNONITES
MISS THE DOT = METHODISTS
CAROL MACINTOSH = ROMAN CATHOLICS
(and GLORIOUS RUG PIES = RELIGIOUS GROUPS)