There is no rule to suspend someone for jumping in and causing a fight.

- howie feltersnatch
My mistake, I misspoke. I was referring to game misconduct. I was thinking of this (the hit being the original altercation and the fight coming after the hit being a second altercation):
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46.3 Altercation - An altercation is a situation involving two players, with at least one to be penalized.
46.7 Fighting After the Original Altercation - A game misconduct penalty shall be imposed on any player who is assessed a major penalty for fighting after the original altercation has started.
Notwithstanding this rule, at the discretion of the Referee, the automatic game misconduct penalty may be waived for a player or goalkeeper in the altercation if the opposing player was clearly the instigator of the altercation.
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It looks like this was applied in-game:
46.11 Instigator - An instigator of an altercation shall be a player who by his actions or demeanor demonstrates any/some of the following criteria: distance traveled; gloves off first; first punch thrown; menacing attitude or posture; verbal instigation or threats; conduct in retaliation to a prior game (or season) incident; obvious retribution for a previous incident in the game or season.
A player who is deemed to be the instigator of an altercation shall be assessed an instigating minor penalty, a major penalty for fighting and a ten-minute misconduct.
A player who is deemed to be both the instigator and aggressor of an altercation shall be assessed an instigating minor penalty, a major penalty for fighting, a ten-minute misconduct (instigator) and a game misconduct penalty (aggressor).