I guess the same way we justify walking across lawns with poor helpless grass being stepped on -- they have no brains or nervous systems. To a vegan, stepping on grass isn't the same thing as stepping on kittens or puppies. That might be difficult for meat eaters to understand.
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.