The argument put forth in the research, however, is that those whose statuses are unchallenged are unlikely to react through violence. In this case, the rich, secure gun nut isn't a threat. It's the unemployed gun nut that can't get a date you need to worry about because culturally, he's the "breadwinner" who defends his family through violence.
I think the cultural enablers are part of the macro problem, but I agree, that friend with the Facebook options isn't going to hurt anyone; he'll watch as other people get hurt and say, "eh, I like having a gun and it's only black people that get murdered." -- Getting meaningful legislation requires a culture war with these types more than the cast-asides, but certainly, the cast-asides are the ones that pose a tangible individual threat. It makes intuitive sense that the less you have to lose, the more likely you are to "risk it all." Great post, btw. I hadn't seen it before. :)