As per cognitive scientist George Lakoff, this is indeed how those who subscribe to "Strict Father Morality" (which most conservatives embrace) think.

"The Strict Father model is what we might refer to as traditional and patriarchal. In this model, the man is the head of the household and his wife and children defer to his authority, which he uses to guide them, encourage them, and keep them safe. He typically sets and enforces rules for the house. Self-discipline, self-reliance, and respect for legitimate authority are the crucial things that children must learn. In this way, the strict father shows his love, by putting those in his charge on the correct path and punishing them if they go off of it. This is how he prepares his children for a happy and successful life."

These types also have a hard-on for "legitimate authority" so if they view the state or the school system as an illegitimate authority, they see no reason to allow what they teach to "poison the minds" of their children. But you're right, this does deny the humanity of the children as well as the common good of the society.