What we can't do is have this circular-type religious reasoning by the gun lobby where every time there is a shooting they claim the real issue is mental health and the proof they give for it being mental health is that the person shot someone.
I don't think they believe it's a mental health issue only because he shot someone, but because of the reason he shot someone. If he shot his wife's lover, or someone who harmed his child, that would be somewhat understandable but it just seems crazy to shoot someone because of being disrespected at work. This guy probably did have mental issues of some sort, but I agree that doesn't make him insane, either legally or otherwise. By what we know about him at this point it seems he was just a miserable human being, narcissistic, petty and self absorbed, possibly he was a sociopath.