Children small ones any way do not have basic convictions and attitudes other than ones garnered from their parents or society. I think its allowable for teachers and parents to guide them into attitudes and convictions that will make their lives and the lives of others tolerable, like self respect and respect for other people. Although with all the PC stuff out there this is not done as much as it used to be in western cultures because some people probably think this early training is "brainwashing."
I agree, we need education an information right from the start until the last breathtake. Without this we would not be like we are now. Human species is gaining huge amounts of proven and tested facts from the previous generations. We learn basic knowledge to be able to discover new knowledge. Social skills are among the most important nowledge we have. If we get them wrong from the start, from the childhood, then maybe we might not be able to interprete the expressions of other people correctly. New studies show that most young criminals have difficulties to understand facial expressions correctly.
Perhaps we should have more learnig, proven and tested, to those social skills.
But is it necessary to force the local convictions as true in the childs mind for the child to survive in local circumstances? I do not think so. I would regard this as child abuse.