Characters
This is supposed to be a happy occasion. Let’s not bicker and argue about who killed who.
— King of Swamp Castle ‧ Monty Python and the Holy Grail

Behind the line May contain spoilers.
Our reading
An editorial interpretation.
The speaker tries to keep a celebration cheerful by asking everyone not to squabble over who killed whom. The appeal to a happy occasion sits absurdly beside the casual mention of killings, so the plea for calm becomes awkward, understated humour.
Context reviewed