Now listen up sparky because I'm about to learn you something. First, ignore background checks, there's been a recurring theme with many of these shooters ...social media. These criminals are all posting their manifestos, sick thoughts, threats and racist/misogynistic/homophobic ideas.
If the media can find them where are friends,family etc? As part of a background check maybe they would pry into their media profiles? Why aren't these forums administrators regularly checking for these types of comments that could be seen as red flags? Next, if we're going to go down the road of trying to find motive, instead of trying to profile these people looking for the usuals, being a loner, depressed, anxiety, racist,etc instead find what caused them to snap.
Were they on recreational drugs or pychopharmecuticals? The laws on the books aren't being properly enforced and the media has this thing about using the same cliches and memes without real hard investigative journalism.
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.