I've never read any allegations of that sort of incest in the FLDS. They are accused, and likely guilty, of "marrying" girls too young to be married under the laws of most states. But not to their own children, nor anything closer than "cousin", unspecified how close a cousin. They are a relatively small community and to some extent even if they were not polygamist, but separate for some other reason, they'd have a hard time avoiding marriages between "cousins", just as many communities in Appalachia do or did up until the current generation.
However those would be the current laws, previous laws, as recent as August 2005 in Texas, would allow for monogamous marriages of girls as young as 14, and some such as those seem to have occurred. Others cases, in Texas and with the girls of appropriate age to fall under the laws for age of consent (17 unless the other partner is less than 3 years older, then 14) to older men are alleged, and probably occurred, but have not yet resulted in any charges. No evidence of such was submitted before granting custody to the Texas CPS. That is what the courts, and many here, are objecting to. If they, that is CPS in particular and the state in general, can ignore the clear provisions of the law in this case, "for the children", they can do it in other cases and to other people.
Srry: I got my “terms” mixed up. I didn’t mean incest- I meant the underage childrens parents (who now have custody) letting them have contact with their “overaged” pervert “husbands” -
I don’t think the issue with FLDS is incest, it is multiple wives, where some of the wives are underaged. It was the underaged “wives” (i.e., someone’s children) that I was referring to.
(Sorry for being so imprecise...)