Tickytape I am with you on this one.
Not everyone is mentally able to cope with scenes of graphic rape, torture, the bodily trauma of war wounds, and so on. Not everyone can view everything and take a great message from it, some will stick at the visual images and be quite traumatised, that's why some people get PTSD from things they have seen that are too horrible for their mind to process.
People saying 'history is horrible', of course it is, but there's a point in which you can look away or would you all have attended the hangings and taken your children. Torture, the crucifixion, someone's leg getting blown off by a landmine, why on earth would you need to see close up pain to know that these things were wrong.
My husband was traumatised for months after seeing Mel Gibson's the Passion of Christ and he's made of pretty stern stuff. Did he really need to see all that to appreciate Jesus or his 'sacrifice'? I don't think so.
On Schindler's List, I think it's a powerful devastating film to see, and 15 is about right as an age setting. I would be happy for my child to see it at that age, but can't see the point of pushing it back further when you have three more years of school and emotional maturity. But for some children 13 would be fine.
I don't really have an issue with that particular film, just the people who think you ought to see things close up in history to realise what they are really like. That's exactly what I don't want my children to witness, if they really saw the suffering of so many in history, it may simply be too devastating, as indeed many people at the time who went into the concentration camps after the liberation found- they were haunted for ever more. There's nothing squeamish about being a bit protective and age-appropriate about how you expose difficult historical material to teenagers in school, and it should follow the pretty obvious film certification for a start.