It's worth listening to this interview with Kirby Dick, about his new film Outrage, which investigates closeted politicians, who presumably are supporting an anti-gay agenda. I think I get the impetus--there's certainly a kind of cowardice at work in being in the closet and supporting homophobes.
That said, I'm deeply skeptical. When white gays compare their experience to African-Americans, the response is often to note that blacks have no closet, and thus no choice about how to live. They're going to experience racism, no matter what. It's a fair distinction and an important difference. But I suspect (though I'm not sure) that it undervalues the way blackness in this country forces you face yourself, while overvalue the virtues of concealing yourself.
I'm in the realm of theory and imagination here--being black is elemental to me, almost in the way that religion is elemental to the devout. I can't imagine myself without it, and more to the point, I think I'd be deeply unhappy if I had to conceal anything that important from my family, friends and colleagues. And it's not just concealing, it's accepting a presumed inferiority, an assumed deviance, and in that acceptance, a spiritual corruption. The closet may be choice--but it isn't one I'd want, anymore than someone who's white wants to afraid of the police.