That's funny because Pete Carroll is nothing like that, at least from what I can gather from his media appearances. He's always gracious, soft spoken, jovial, and informative.
I do remember Crabtree talking some shizz over the offseason directed at Sherman. (Don't recall if it was before or after his Achilles tear.) So that's why that interview happened. Man just won the NFC Championship, he's amped. I think it's great that the guy that took a swing at him after getting an "atta-boy" is not having disparaging remarks sent his way when he actually tried to physically assault Sherman after the game was over. (Probably another reason the remarks happened.) But yeah, Sherman opens his mouth and everyone is talking about him being "classless".
Context is everything.