Sindre
You act like being defensive and close is something my family, especially my grandfather, can just turn off. They lived in essentially a never-ending war, in a world where everyone thought my family was insane. My grandmother was murdered by a demon, and that kind of siege life was how they lived until they came here. That's not something you flip a switch on. Winchesters would die for each other, and it's not easy, especially for my dad, to realise that isn't really necessary anymore. We're not a close family to piss off other people, Sin.
If you had, I don't know, had a fight about something stupid, or broken up after a real talk, or whatever, I'd have stayed out of it. Dani's a big girl. I know that. But it's different if she's, for lack of a better word, attacked. I want to attack whatever's hurting her, and if you ask her, she'd say she'd do the same thing for me. And that's not something she and I do to be insular, it's not something we do to scare off people. It's in our blood.
I have no idea if you can be what she wants or what you want because I don't know you as well as my sister does. There's nothing wrong with trying to make it work. But my sister means more to me than anyone else in the entire world, with the possible exception of my parents, and I couldn't stop protecting her and defending her even if I wanted to. It's a product of how my family has had to live that our first reaction is defensive and violent. We're learning, but that's all I can promise you right now.