This is just a classic teenage girl phase. It's so rude that she did that and just tell her it's rude she doesn't seem like a great friend if she did that to you. I've been there every girls been there.
She's just jealous she didn't find it before you and now she's taking the credit for if. But just tell her to stick to her lane if you know what I mean.
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.