And I'd like to note that the quotes describing the Gur as proving "to be as treacherous as their reputations suggested" and such were not taken from the mouths of NPCS, but were included in the background to the adventure and are, therefore, correctly ascribed to the author and editor of the piece.
You might note that in this case, this particular group was treacherous and does seem to be living up to the stereotype that Realms natives have of them. I think that is apt in this case and you will note by my response above, its intentional since we want to depict these individuals as real people with flaws. I also suggest that you are jumping ahead of the story and trying to encapsulate all of it in one adventure as opposed to its development over the course of a season.
It's disappointing that AL once again has to resort to rushed corrections after the fact rather than catching these problems in advance.
Is there another example of offensive material in an adventure that was later edited out of an AL adventure? I can't think of one off the top of my head, but perhaps you are trying to use corrections to grammar or stat blocks unrelated to your argument to support your argument. I understand the need when you target an opponent of racism by calling them a racist to need some sort of evidence to back it up, but I think you might be stretching a bit in this case. That said, in this case, especially after all of the arguments the admins have had on the Facebook groups decrying the use of the gypsy slur and trying to help educate others, it is unfortunate that we did not catch the examples in this adventure.