I would not judge all JW's based on what you do. So why would you judge all Trinitarians Based on what one person does. There are many trinitarians who do not believe in war or killing for any reason such as the Amish and Menonites.
I don't think Adam was an active trinitarian. Remember what blacks did all over the country? They went and beat up whites just because of racist hatred.
Then after it was over, it was reported that zimmerman wasnt even "white". People make mistakes in mass hysteria. Listening to national news media also proved to conspiratorial in editing false witness against zimmerman.
So I don't believe Lanza was an active christian. I would believe government mind control conspiracies before I believed this. Also remember there have been many false rumors and gossip on this case.
Don't let anyone say to you what the truth, even after some kind of warren commition ends the debate.
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.