And because there are straight-up racists out there, people on Twitter objected to the idea of Hermione as a black woman. Others rejected Dumezweni supposedly not because she's black, but because she isn't Emma Watson.
The only reason that black hermione is weird to me, is the fact that it's not Emma Watson anymore. She is too attractive to be forgotten.— Cody Kunz (@lackthereof1783) December 22, 2015
After seeing Emma Watson do such a great job playing Hermione, it's kinda difficult to comprehend the idea of a black Hermione.— Janani Krishnan (@Janani13) December 21, 2015
I understand some people not liking a black Hermione... I mean we've got used to the Emma Watson— JKR (@Optimus_Primus_) December 21, 2015