Maybe you didn't start with one, but the Cas I know would never do this. He was too good for it. Maybe cared too much. Definitely cared too much, considering you made that stupid deal with Crowley!

[Dean pushes himself to his feet, wobbling only slightly, and rubs his hands together. He's scared for himself, but he's even more scared for Sam and Bobby and the incredibly idiotic angel/god standing in front of him.]

You grew a damn heart, Cas. Why'd you throw it away?