You know, it's kind of a funny thing, whether Christians/Catholics/whoever believe that Jesus is God, whether they are two seperate beings, whatever. I've known Jewish people that believe in Jesus, just not that he was the long awaited Messiah-that he was a prophet of God who was another that preached God's word. I know that Muslims generally believe that as well.
I was raised Catholic, and the one thing that stuck with me (even though I don't consider myself Catholic anymore) is what one priest taught me, aside from anyone else. He told me once (and I think this can apply in a lot of teachings other than Catholicism. He didn't reject any kind of idea, even if it wasn't strictly canon, and always tried to find a bridge between religion and science-in other words, he encouraged his students to THINK, instead of just blindly believing Church teachings or how we were brought up) to think of the Trinity as a three sided coin. God, Jesus, and the Holy Spirit are three aspects of the same being. If you look at just one side, you may understand a part of the truth and be blessed for that, but you won't see the true essence of the whole coin.
I don't know so much about other Christian groups other than they generally place a greater importance of the aspect of Jesus, but there was one other lesson I took away from this priest. If you are happy, aren't hurting anyone else, and are generally trying to promote good will in the world, you are blessed by God. We may not understand the actions of this family, but that does not mean they are wrong in their choice to live a polygamous lifestyle. I wouldn't want to share my man with anyone else, but I think it's just as wrong to condemn polygamy as it is to condemn homosexuality.
*Off my soapbox box now* Sorry... I don't mean to offend anyone, but the stripping away of people's rights kinda scares me. Any friction in Kody and whichever wife's marriage is between them, I feel, and no different than any other marriage in the USA today.