Being against government schooling because the results are appalling is like being against murder because it causes a cadaver. Yes, that's what murder does, but it's not what murder is. It is the intent and consent of the will that we condemn. The reason we put a murderer behind bars is not ultimately because his victim is dead but because he made a very bad choice. I believe government schooling is a very bad choice.
Parents have a positive, solemn and sacred duty to educate their children.
This is firmly rooted in natural law and Christian tradition, and backed up by common sense. Civilization depends on the strength of families. To the extent that families abnegate their duties, and relinquish their rights, they are weakened, and so is civil society. To the extent that government accepts or usurps those rights and duties which do not belong to it, such a government exceeds its legitimate authority and becomes tyrannical. The same way we classify any other good or service.