Apparently the shooter has already been arrested, although Obama may not have known that when he made his statement. I wouldn't read too much into it, because political leaders (Presidents, Prime Ministers, Interior/Justice Ministers, etc) always say something like that when a major crime happens in every country.
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.