This
Why did he do that?This story has no details. Not sure how you want help.
Affect his appeal? Which apparently has no chance of success?
To me it seems there is more to the story as they claim in the letter that LE was involved so there can be a report with details that might not necessarily be true but of which the airline can base their decision off.
How sad is it that a father of 7 curses out a flight attendant unprovoked