I don't think anyone wishes to have them go back to the criminal aspect of their lives. I think some are concerned about the upheaval in the process of removing them. If not done correctly could be very psychologicaly damaging.
ETA: when I say them, I'm referring to the children.
I've been trying to keep up with this thread while working for the past couple of days. What a fascinating topic!
I read "Under the Banner of Heaven" a few years ago. Have also seen a few documentaries about the FLDS groups. All I can say is it's about time this raid happened.
It may well be psychologically upsetting to the children for a while, but with counseling they will adjust and be so much better off.
These groups are like a festering sore that need to be wiped out. Permanently.