Well if you have a better explanation of how a simple request for a set of unimportant documents became the catalyst for a confrontation which spiraled out of control leading to a diversion solely to offload a crew member, then have at it.
The guy's position was being subverted within his company, maybe a whispering campaign (hang over from previous industrial unrest... who knows).
An uppity purser provokes an outbreak of insubordination amongst the CC and things come to a head, ultimately by chance, over the Gendecs.
The Captain decides enough is enough and takes a perfectly legitimate course of action and removes the ring leader.
Command decision made.
Job done!