All excellent points, and yet amazingly there are some here who believe the judge has absolutely no basis to hold the children.
A cult is a group with a single mind and it is united in purpose and is closed to outsiders, it is especially closed to routine law enforcement.
In a cult that has mothers, fathers, and children only and the crimes they are suspected of are of the mothers and fathers conspiring to breed children, isolate them and brainwash them for rape and continued polygamous relationships to feed the enclosed cycles, then the only way to stand a chance of breaking the cycles and the rapes, is to act as Texas has.
We are not an impotent nation and it is not beyond our abilities to deal with this (or had better not be), and Texas has decided to confront it and try to save children.