No. Even if it makes no logical sense, they still may have religious reasons for it, and confiscating the kids because of that would interfere with Freedom of Religion. I understand a government that isn't all-powerful is a foreign concept to this forum, but people still have their rights. Children aren't the property of muh guvment, and this very idea that they can force parents to put something in their kid's bodies is sickening.
It's sickening to think that parents should be able to deny their children medical care for "religious reasons". You do realize children have died because parents wouldn't give their children medicine or allow them cancer treatment, right?