"The omega's fault, naturally. There's no need to be overly caught up on being unhappy when you have an alpha to provide for you." Yeah. That would be Zachariah agreeing with Crowley.

Castiel is young. He's grown up with this kind of talk and way of thinking poisoning his mind. But when his eyes meet Sam's, one thing becomes very obvious - while he doesn't truly know better yet, he has the potential to. There's a spark of curiosity in his eyes, a wish to explore the world Sam sketches out.