If it was United Airlines, I could understand his response. Probably due to the abyssmal customer service, or being screwed out of his frequent flyer mileage.
Maybe he was insulted by the same hostile/ugly 6'6" lesbo working at SFO with its bigger/meaner/more hostile transexual twin at LAX that used to insult all male UA Shuttle passengers at both SFO and LAX.
Two years ago I was verbally roughed up by both of them in the same day and got caught in a bomb scare in LAX. My luggage and everything got delivered to my hotel at 3 am from a 2 pm arrival. That was when I stopped flying out of SFO and LAX and retired from my consulting career.