Oh yes. He's going to murder Jason when he gets hold of the man. From the way the wall got punched again, Sam thought that Dean would be helping.

Not that he thought for even a second that Dean wouldn't.

"Yeah. Yeah, of course you can get dressed." He looks at Castiel for a moment. "Do you want me to take the collar off?" Because as much as he wants it off of Castiel, that last physically removable part of Jason's claim, he knows that Castiel may need it. For a while longer, at least.