I have a big issue with the men who disappeared when their children were taken from their homes. If they believe they did nothing wrong, why are they now invisible?
As for the polygamy, I don't really have a problem with it so long as the particpants are consenting adults. Religions all have odd behavior we turn a blind eye to, and I don't find the practice of polygamy any worse than other religious practices. Just leave the kids alone.
It's hard for me to believe all those kids were being abused, though.