Let's look at rule 10 again.
quote:
Keep discussion civil and avoid inflammatory behavior that might distract attention from the topic. Argue the position, not the person.
Usually, in a well-conducted debate, speakers are either emotionally uncommitted or can preserve sufficient detachment to maintain a coolly academic approach.
-- Encylopedia Brittanica, on debate
He wasn't discussing or debating. He was telling a story. What he offended was the position, not anybody... alive anyway. That rule doesn't apply. Try again.