Woltz was loud and insulting. However, Tom maintained his calm and seemed completely beaten and accepting of Woltz's decision. And then he got his revenge.
Interesting detail: During the dinner scene, Tom hardly says anything. He mentions the sacred meaning of being a godfather. And that Vito never asks twice for a favor. Then Woltz starts in fact a monologue. And Tom doesn't interrupt at all. He waits and leaves.
