Originally Posted by
Loki
Polygamy seems to have been dying out by the time Christ was born, and Roman implementation of Christianity didn't allow for polygamy (since Roman customs didn't allow it). There were only a few minor attempts since Rome's adoption of Christianity to bring back polygamy. As for why mainline Christians in the US hate polygamy, it's probably because they thought Mormons were heretics for making up new stories about Jesus, and thus viewed all unique Mormon practices with extra suspicion.