Strange point but I believe if you were mentally impaired then you would feel your OWN emotional feelings and whether they were of happiness or sadness and as to whether you liked it or not I do not think you would have the ability to distinguish the difference as you would probably not know the difference.
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.