The scene when The Godfather meets with the Turk- about 3:40 in this clip.
The Godfather is telling the Turk no and giving him his reasons. The Turk tells him if he’s worried about his money the Tattaglia family will guarantee his investment.
Sonny interrupts with
Vito cuts him off instantly, apologizes to the Turk for Sonny being out of line, and later reads him the riot act:
Perhaps it’s the way that James Caan played the scene, but other than the fact he interrupted his dad I never understood what the Don was so upset about. The way Caan plays it there’s sort of an “Eff you, who do you think you are to say the Tattaglias are gonna guarantee our interest?” feel, but apparently the Turk hears something that lets him know that if the old man was out of the way the new don would be willing to allow heroin.
Another reason this didn’t make sense to me is that it’s known that Vito’s relationships with politicians are largely personal: he’s spent decades forming and cultivating these relationships based on mutual interest and trust and discretion, and they’re not necessarily going to pass down to his successor, especially Sonny who’s about as discreet as a rampaging bull. The whole reason the Turk is going to Corleone is political protection- the money is secondary- so it doesn’t make sense he’d want to remove the Don when
1- Sonny won’t have the old man’s political influence
2- Sonny is a known hot head who’s going to avenge his father (especially if he feels partly responsible for getting the old man shot)
3- The Don has already told him, honestly, why he won’t help him
Any insight into what about that interruption tipped Sonny’s hand?