I would rather raise my child isolated from indoctrination (in evil) AND all other children, than expose them to indoctrination (in evil).
The other thing I do feel is how children who have been bought up in this safe environment do cope when exposed to the world at 16 or 18. Hopefully that have been taught about it but how much are the parents aware of it? Also do the parents posses the skills to home school not everyone is a natural teacher and can pass on knowledge. What is you are lousy at maths or English or your history is not good. I know there are obviously home schooling books and a curriculum you have to work to but I am sure there are many parents who will feel inadequate to do this.