You make an interesting case, Azarkon. I certainly have no hesitation in agreeing that one should accept your nation's history without blinkers on. However, it is my perception that many kids today learn only the bad about their nation's history. You could say some redress is needed. The first black bishop in the church of England, recently throned, said as much in his inaugural comments. Although he is from Uganda, and proud of it, he also said British People should be proud of the many good things the Empire did, as well as repenting the bad.
I also note you say history should not be a means of indoctrination, and particularly indoctrination of morality. A devil's advocate might say that public morality can ill afford to turn away any assistance whatsoever.