Not all of them were -- obviously not all men in a culture can be truly homosexual -- and Greek homoeroticism and pederasty seem to have been confined to the upper classes in certain areas, though we still don't know enough about it to be sure. Outside of that culture, it wasn't particularly common as far as we can tell. It involved an institutionalized, cultural view, first, that men were superior to women and that love between men was therefore superior to love between men and women, which didn't involve much more than reproduction.
(Greek women were made to live far more circumscribed lives than men were; they were really treated rather badly as compared with Roman women.) Second, the idea was that an older man became a mentor to a young boy, teaching him a wide variety of things about life, sex, etc. This is a highly simplified view I'm giving you. There are sites on the subject and also books. More.
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.