I've now read the module. I don't see a great deal to object to. The slur "gypsy" is never used. That settled townsfolk are often distrustful of nomads (and often for good reason, nomads are often in desperate situations) is a simple fact of sociology probably predating written history, and is of itself unremarkable. Any insistence that "they are Gypsies" is sheer laziness, identical things can be and are said about Irish Travellers (think Brad Pitt in "Snatch"), Hobos in Dustbowl-era America, and other nomad subcultures and ethnicities. Stereotypes are at work, but none of them are genuinely exclusive to a specific ethnic minority, and rather than being reinforced those stereotypes are actively called into question and found wanting. We are indeed in a situation quite similar to that of Huck Finn: bias is portrayed in service of questioning and undermining it.
I can agree with offense being taken when it is meant, but this seems to be a case of taking offense where it doesn't exist, inventing it out of whole cloth for the sheer joy of expressing outrage. There is tension between townsfolk and nomads: the plot unwinds in pursuit of resolving the tension. Both townsfolk and nomads are so generic they can't convincingly be linked to anything IRL.
I find it extremely telling that those townsfolk clinging to their prejudices and closing their minds are proven wrong, as Aya Glenmiir predicted. The thieves aren't evil, they did bad things for good reasons- motive is always a factor, and can even distinguish one crime from a similar crime. "The ends justify the means" is not a foolproof moral code, but it's so often invoked it's hard not to see it being very seductive for terrified nomads, lacking in security even in relatively good circumstances.
I have the following objections:
On page 6 the Gur are incorrectly referred to as a race. They are an ethnicity.
The bulleted list near the end of page 6 lacks a bullet discussing Sybil. Information about this character is crucial and should get an earlier drop than it does presently. It's in the player handout, its omission here is an editing flaw. There should be parallelism between the list and the handout. It is also muddled in the text and should be added to page 6 and the handout that the thieves are respectively Sybil's son, husband, father, and grandfather, which should be a huge red flag that whatever's going on Sybil is at the center of it.
These are editing issues, but relatively minor compared to some other modules.