I dont know, maybe I'm just crazy but all this stuff added together.. the girl has to be young and pure.. the ceremony.. the "making life"... what if they are trying to make Bree into the modern day Virgin Mary? and they need her to pop out a Jesus for the order...

Ps: to explain more into the ribozymes and why it reminded me of a virgin mary scenario --------: " that are actually capable of catalyzing their own synthesis. " .... which struck me as - Bree making another human by herself.