The Chinese build the wall but forgot to character-build guards
1. Destroy their family structure.
2. Destroy their educational system.
3. Lower their role models and references.
2. To destroy education, you should give no importance to the teacher and lower his/her place in society so that the student despises him/her.
For when a conscious mother disappears, a dedicated teacher disappears, and a down fall of role models, who will teach the youngsters value systems.