BA,
[/quote ???Again, you don't understand children well. Most of what they hear goes in one ear and out the other, as it does with history, geography, and much else.
A lot better than you do it seems, as indeed do the religions that spend so much money, time and effort trying to get to them early. Why do you suppose they do that if it actually does go "in one ear and out the other"? Indeed, in that case why bother with education at all at that age?
As to your quote: well isn't it just conceivable, even in your world, that Christian principles of love and forgiveness, etc, are worth imparting from an early age?
First, what on earth would make you think them to be "Christian" principles rather than ideals that most societies hold to be desirable in any case?
Second, why would a school not be able to teach the desirability of these things without also making a lot of unwarranted claims of fact from any of several various religious faiths?