Simply, the "nursery rhyme" is none else than the silent music, which can be heard throughout the cursed video. So of course, it's the first thing they hear when they're about to die, just like the metallic screeching in Ring (1998) and Ring 2 (although it's slightly different here), and the sound of the cursed video in The Ring. Back to the top.
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.