Because it's a film religious people believe children should see with their family at a young age. But now that I think about it, you're right. There is a lot killing and violence in the film and it should be rated at the least PG.
But if they tried to change the rating today you know what people would say, they would claim it's a plot by Obama and the government to deny people their right to teach their young children about their religion.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.