He's not angry at Tom; he's just made up his mind on a course of action. Of course, just a few minuts later, Sonny accepts Tom's caution to consider the disastrous results if Sonny pursues that course of action. Also, don't forget that in a previous scene in Vito's office just before they are brought the fish in Luca's vest that Sonny calls Tom Consigliere when he asks him for advice if Vito dies. When he calls Tom Consigliere in the scene you are referring to, Sonny's simply emphasizing that he intends a course of action that is a departure from Tom's proposed course of action and Tom's course of action is a function of his role as Consigliere. Remember, Tom's Consigliere role is to advance the interests of the Corleone family at the least cost to the Corleones and certainly without spilling blood.
Agreed. Nevertheless, they have a brotherlike relationship. They've called each other "Sonny" and "Tom"/"Tomanouch" for years. So it's a little strange that when Sonny's losing his temper, he calls his brother consigliere. To me it sounds a little like: "Oh Tom, don't try to play the consigliere."
Later, when Sonny is shot, Vito calls Tom "consigliere of mine", as if to remind him that this is his function. This also contrasts the very private situation.
Would Tom have ever called Sonny "Godfather"?
Would Vito have ever called Genco "consigliere of mine"?
