I'm sorry. I assumed too much about you, and I'm a bit ashamed for sounding so patronizing in my previous post. You seem wiser than me, and you're definitely wiser than I was back when it happened: I tried to defend myself. That's how the quarrel happened: I believed that I cared about morality, so I didn't want to just accept the accusation that I'm inherently immoral. That led to a few more shouts than it should; but as your sibling commenter says, at such points emotions tend to run high. I could have just walked away, and that would have been wiser. Somehow, I didn't manage to.
> What makes you think that?
Because you said you're "not even able to fathom how this is possible" - honestly, I still don't quite understand that sentence, especially after what you wrote above. It looks like you're advocating stoicism and disengagement, and I agree that it's a good strategy. But I can't believe you never felt the anger of being perceived through a lens of a belief that makes you into someone you're not - and that you "can't fathom" how that anger can get the better of you, to make you "stand there arguing with them about it". I get that you're able to rein in those emotions and simply walk away from situations like that; but I can't bring myself to believe you never felt that anger at all.
> You don't need him to accept it. You just need him to shut up about it.
Yes, that's rational. It's a way to live on without turning all family meetings into war. But maybe that particular war is worth fighting? Maybe, through countless battles over the Christmas tables, society changes course? Maybe by fighting against the belief that you're something lesser than human, by turning your life into a miserable one, you're paving a way for younger family members or the next generation to live their lives a little better than you could?
I don't know, to be honest. I'm not some activist. But I think I can understand people who decide to "stand there and argue". It's probably less rational and often leads to quarrels, but I'm almost sure that beliefs that are never challenged won't ever be changed. That's why I found your "I can't fathom" line a bit strange; sorry for overreacting :)