Since they are not legally married (civil) then they cannot be committing illegal polygamy since the definition of polygamy is MARRIED to more than one spouse.
And if they are not legally married and under 17, then the fathers of their babies are committing statutory rape.
The FLDS men have got themselves between a rock and a hard spot by spiritually marrying girls under 17. If they are not legally married to them, it’s statutory rape (parents can only give consent to a legal marriage, not a spiritual one). And if they legally marry them and have other legal, undissolved marriages, then they have broken the bigamy laws.
They could have exercised their belief in plural spiritual marriage AND obeyed the age of consent laws, but they chose not to.
Religious freedom does not give you the right to disobey the laws you don’t like or agree with. Warren Jeffs is a false prophet.
God does not contradict himself, ever. Revelations that contradict the Word of God are false.