When you say things like that, you do yourself and your church no favors.
He is simply being honest about the doctrines of demons that are taught by the LDS Church.
This is where the rubber meets the road. Polygamy is the heart and soul of the Mormon "gospel". They believe that they can't become a God if they don't practice Polygamy. Therefore it MUST be Moral, even if it is, in no uncertain terms, condemned by none other than the Book of Mormon!
The Book of Mormon is nothing more to the LDS Church than the means upon which they can create a false testimony to the idea that Joseph Smith was a prophet of God. Once they believe that, then the convert is ripe to believe all this "polygamy is good" nonsense. Well as we can see from this Cult in Texas, polygamy is inherently evil. It is a disease, a destructive cancer.