Okay, I’ve seen this claimed before, and I confess an ignorance of the history of the LDS/Mormon church, so can someone enlighten me?
http://en.wikipedia.org/wiki/Religious_and_mythological_references_in_Battlestar_Galactica
Glen Larson, the creator and executive producer of the show, was raised in the Mormon faith, and he used some ideas from his church in the show.
Mostly it was background stuff, like referring to marriage as “sealing”. The planet Kobol is an anagram of “Kolob”, a star mentioned in Mormon scripture. The reference to a lost 13th colony is similar to Mormon talk of a 13th tribe of Israel.
In several episodes, the Colonials encounter super-advanced, godlike aliens. While this is an old cliche in science fiction, it also has parallels in Mormon theology.
I assumed it was about the remnants of the true faith sent on a wandering journey looking for the promised land.
So Starbuck’s dilemma of having to choose between Athena and Cassiopeia was pointless - he could have just married both.
Specifically the LDS doctrine of Exaltation. The exact words used by the Seraphs (aka Beings of Light) in BSG were “"As you now are, we once were; as we now are you may yet become.”
IIRC one of the unfilmed for the original series had Starbuck & Apollo help out a friend who was in hot water with both of his wives. In the reimagined series continuity group marriage is legal on Caprica, and probably elsewhere.