We saw in the last chapter that Sanji attacked Killingham.
Sanji, who intimidated him and said he would punish him, attacked him right in the head and then lamented, saying how weak Killingham was because he sees him as weak compared to himself, while we see Jinbe and Franky only attacking the MMA...
Jinbe and Franky helped tie up the limbs because Sanji hadn't killed him.
But looking at the whole context and thinking it was a 3vs1 is something only a retard would do.