You simple can't add a fragment to a fragment this needs to happen in the FragmentActivity. I assume you are creating the LoginFragment in a FragmentActivity, so in order to get this working you need to add the HomeFragment via the FragmentActivity when the login closes.
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.