The most famous forms of Holocaust denial and revisionism tend to focus on Jews, casting doubt, for example, on how many were exterminated in the camps. But denying the impact the Nazis had on the other groups they targeted, including queer and trans people, disabled people and Romani people, is still Holocaust denial. Maybe someone should tell J.K. Rowling.
In that case, it’s hard to know whether that is Rowling and I have a poor memory about this or that the movie’s screenwriter made revisions on that front. I think either is a possibility at this point. I’d love someone else to chime in who is more familiar with the books.
I think thats the script writers, if memory serves right muggle is pretty inoffensive in the books partly cause the bad guys have their own term “mud blood” for those who are born to non magical parents. Honestly I think at worst its comparable to how people said “negro” in a non racist way back during and before the civil rights era here in the US. But I legit dont know if Rowling meant for those undertones, im not familiar enough with British civil rights history.
Also Rowling may have been aluding to that for all I know cause the wizarding world is pretty explicitly backwards, serisouly they cut themselves off from the rest of the world sometime in the 1800. One of the secondary protagonists dad is a magical ATF agent who tracks down enchanted mundane artifacts that re-enter the non magical world.