This is all about human rights versus religious rights.
The same toxic thinking that allows the FLDS allows fundamental Islamist and Christianist viewpoints where religious beliefs are held to trump human rights.
Thus in Islamist culture, the rights of women are infringed, freedom of speech is curtailed, and some even go as far as to wage 'religious war' in the form of terrorism against civilians.
Some Christianists (and I use that form to specify the worst of the worst, not your average moderate Christian) seek to force pseudo-science into the school curriculum and try to legislate to interfere with the freedoms of people who, whilst doing no real harm to others, live against Christianist religious scruples.
The FLDS infringe on the rights of minors through their restrictive education and wharped sexual practices.
Basically, any adult fool can believe what they like. Their right to religious freedom ends when they infinge on the freedoms of others by exercise of their beliefs.
The courts need to stand up to religious groups like the FLDS, and stand up for the children who are being denied their rights to ever BE ABLE to have freedom of choice because of their parent's choices. This same paradigm needs to be taken against religious fundy home-schoolers as a whole so their children cannot be wharped, even if the wharping is not sexual but just denial of a decent rounded education. In state schools, religious opt-outs of certain lessons should not be possible, again to ensure the childs right to a decent education is not impaired.
And any country that does not respect the rights of women should have trade embargoes slapped on them, even if they are stategically important allies with lots of oil and billions to spend on US-manufactured weapons.