The entire xml is parsed anyway by the core implementation. The etree. Iterparse is just a view in generator style, that provides a simple filtering by tag name (see docstring lxml.de/api/lxml.etree.iterparse-class.html ).
If you want a complex filtering you should do by it's own.
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.