I’m not saying the FB post is productive, and I don’t think I’d do that, but I think I understand how you could get there.
The thing is, for your average Doper, politics is optional. At most it means a couple dollars of your taxes going to one thing versus going to this other thing, or a tiny difference in your tax rate. Maybe, if you know someone in the military, it means missing them for the couple months they went to Iraq, but military types have to travel all the time anyway. But for most of us, no matter who wins, the most important things (for most of us in this order) are still here and not changed: our family, our friends, and our jobs. So most of us can ignore politics. Not talking politics is a way of saying “look, your friendship is more important than any petty political issues about the size of the defense budget or gay rights or whatever. It’s like White Sox fans versus Cubs fans: too silly to really argue about.” And, hey, that’s great that so many of us are so well off that we can afford to ignore politics.
But some people aren’t. To the FB person, politics isn’t something abstract about boring federal budgets, and it’s not some ball game where winning is just about winning and in the end nothing else. It is literally about their family and whether they’re allowed to have one. So telling him you don’t want to discuss politics isn’t saying ‘I value your friendship’; it’s saying ‘I don’t care about your family’.
Now, I can kind of understand how, if I was in that situation and people kept telling me “Look, talking about politics might hurt my feelings, so just shut up about it please, so we can talk about my children instead”, I might get a little angry, too. And might try to make people understand that by opposing gay rights you’re not just taking some ‘cheer for the Green team or the Orange team’ academic position, but you’re attacking me personally. And maybe, in frustration at people who refuse to think of their politics as having any real personal impact, I might have to try and dramatize that by telling people that supporting candidates who oppose gay rights is in fact a personal attack on me and my family, and therefore anyone who does so must not care enough about me to be my friend.
Again, I’m not saying this is productive, but then again, I’m lucky enough that my family isn’t at stake here, so I can afford to sit back and ponder it without too much emotion. I have no idea how objective I’d be if it was my marriage on the line.