Sanji stopped Nami from interfering remember, he even stated what Zoro was saying was right it in regards to crews respect for their captain. Even if Sanji was agreeing with Zoro there isn't much more to say is there
But Sanji wouldnt do the same lvl of threat. He agrees but he isnt as passionate enough to threaten to do something like that. Since at the end of the day, he accepts whatever Luffy’s decision is. Hes always been like this….look at this panel.
You see how it is only Zoro, Jinbe and Franky getting angry. Whilst Sanji isnt even shown, cause he wouldmt be like that. Straight away Sanji’s first goal is to get Luffy to Kaido safely.
Sanji’s devotion is 100% Luffy.