I think gun owners and homosexuals have a lot in common actually.
You can say it's socially acceptable for a homosexual to be open, but get real... half the people on this forum got angry reading that sentence ("gun owners and homosexuals") and we all know it.
The issue, in both cases, is Social Deviance. As in, "Sociology 101", the deviation (difference from normal) of the individual. Humans are very sensitive to perceived Social Deviance. They react violently to unfamiliar styles of dress, appearance, and lifestyle. Humans aren't alone - animals routinely ostracize and kill deviant members of their own species.
If you are in a place where guns are normal you aren't a deviant for being a gun-user and it is no big deal to talk about guns. If you are in a place where homosexuality is normal, again you aren't a deviant for being a homosexual and it's no big deal to talk about homosexuality.
What about everywhere else?
We hear stories about ROTC students suspended or expelled, shooters fired for saying they went shooting, homosexuals beaten, children kicked out of their homes, people being ridiculed constantly, jobs lost, friends lost...we hear many stories not just about gun owners and homosexuals, but about immigrants, atheists, muslims, nerds, and everyone else who is just a bit too different. A bit too deviant.
That's what keeps minorities in the closet. Homosexuals, gun owners, pastafarians, mensa members, you name it - fear of punishment for being social deviants. It takes a lot of courage to expose your deviance. To tell someone that may have power over you, "I am an atheist", or "I own a handgun." To start a conversation you know can cost you everything humans value -- friends, family, income, and place in society.
There are huge, very real, pressures keeping us from exposing ourselves. I said before we needed to talk about guns more often, but at the same time I don't want to sugar coat the fact that those conversations can have harmful consequences. This is the real world and not everything has the Hollywood, "I came out and everything was fine forever after" ending. Sometimes Matthew Shepard is tortured and murdered for being gay.
The question is, is there any possible reward?
One reward, and this is something the homosexual community has been counting on for 25+ years now, is that familiarity reduces the perception of deviance. That's the theory behind open carry rallies and the like ... by repeatedly exposing people to something considered deviant, you acclimatize them to the behavior and they start to see it as normal. Gun owners need to do more of that. So do atheists and sikh and a whole bunch of other deviant groups.
There are other benefits. You find that others you know share similar interests but wouldn't start the conversation. You...well, I'm repeating myself now.
If we want to keep our 2A rights we need to be realistic about what we are...deviants (why? IMO because of those old foggies I mentioned before that didn't talk about their guns)...and we need to start looking at other groups who have faced the situation we are in. Outsider groups who have made inroads towards acceptance as normal. Homosexuals have walked that road and we could do a lot worse than using what has worked for them.