Santino is completely responsible for the hit on his father because when he spoke out he let Sollozzo know that he wanted the deal. When Sollozzo hits the Don, he snatches Hagen to try and make a deal with sonny, he even mentions to Hagen that he knew sonny was 'hot for his deal'. I don't think that Sollozzo would have risked everything if he did not think that he could make a deal with sonny. That was the key.
You know, we always called each other goodfellas. Like, you'd say to somebody: "You're gonna like this guy; he's all right. He's a goodfella. He's one of us." You understand? We were goodfellas, wiseguys.
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