I have never watched a Harry Potter movie, but on the racism scale this seems pretty thin:
Claudia Kim as Nagini as seen in Fantastic Beasts: The Crimes of Grindelwald trailer. (Photo: Warner Bros.)
The final trailer for Fantastic Beasts: The Crimes of Grindelwald contained a jaw-dropping character reveal that has some Harry Potter fans fuming. As it turns out, one of the prequel franchise’s “new” characters, played by Claudia Kim, is actually a familiar villain from the original series: Voldemort’s evil snake companion Nagini.Author and screenwriter J.K. Rowling tweeted that she’d been sitting on this secret “for around 20 years.” But social media skeptics say that Nagini’s shocking past as a Korean woman seems highly implausible and possibly racist. (……)
Fans are picking up on a few problems with this change. First, there’s the issue of representation: Nagini is only the second significant Asian character introduced in the Potterverse, and we know that her fate involves being the murdering pet reptile of a wizard who believes those without “pure blood” should not live. This plays into a couple of nasty stereotypes about Asian women often scene in Hollywood films: the sinister, exotic “dragon lady” and the submissive, voiceless sex object. [Yahoo]