If he were human, he'd still care about his brother. He'd still love the only family he has left. The one he sacrificed his whole life to protect. And it would break my heart. But not the way demon Dean did.
Reichenbach [gifset] - It's just a car, Sam. - we speculated and they warned us, it's not as bad as I thought DemonDean's disregard of Baby would be, but still. - Sam and Demon Dean Winchester, Supernatural