It's not the same kindof "intense" as horror movies, but I think the average 15 year old could probably handle it. It has some very emotionally intense scenes, especially the montage at the end. It shows people living with the consequences of the drug addiction and it's not pretty.
If I were your parent, I'd want to watch it with you so I could talk to you about it afterwards even though it has a pretty disturbing sex scene at the end.
Bad'' in the parental guidance way just means in terms of RFAD that there is heavy drug use and a disturbing sex scene, and common themes in the movie such as depression, loss. When people call it a horror movie, they mean it in a certain way, more of what extents the characters go to, to get drugs or to achieve whatever dreams they may have. I think a 15 year old can handle it if you treat the issues presented with seriousness.
It is a truly terrific film though.
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.