That was a kind of litmus test wasn't it for what America can stomach, i find it equally infuriating and repulsive. The apathy from many is very annoying to, for example some banker in NYC probably could not give 2 shits and they should because it is their responsibility.
http://www.latimes.com/business/hiltzik/la-fi-hiltzik-gun-research-funding-20160614-snap-story.html
The above is an absolute disgrace and if i was American i could not go day to day without challenging this constantly. It is shameful beyond what i can articulate.
Not a bad theory, there is a sticking point though i think. I hear he built up a huge arsenal of guns but it must have happened in a reasonably short time. His brother helped him move in and the weapons were not there then. To acquire these weapons is not cheap at all so the theory he was seeing his arse due to huge losses feels unlikely. This was something he possibly started planning a while back.
As an auditor it tells me he was methodical which is generally associated with being prepared and organized isn't it, the attack seems to back that up with a nod to his video surveillance and general preparation taken. Personally i think he simply went all Falling Down, just became at odds with the world and decided to go out like this.
Media will have sniffed around his financial life already to no doubt, if they found anything noteworthy they would have it all over their front pages now imo.
My question is when he started getting all these guns was it in his head then, further down the line and what was it that triggered it. The police need to focus on the time he started to buy the main bulk of these guns. Something happened, the woman who lives with him will know what that is, the idea nothing about him changed that someone close to him like that could not notice i find very unlikely.