So you're saying that 3 wrongs make a right?

For all his brilliance, Tolkien was a first half of the 20th century devout Catholic, so yeah, he was also a bigot. See also the "dark-skinned savages" from the south with the oliphants.

As for The Witcher, same thing: the author is from Poland, the most Catholic country in the world and one of the whitest so yeah, it's predictable that he'd be kinda bigoted too. Not justified at all, though, just to be clear.

Rowling, on the other hand, doesn't even have the flimsy non-excuse of growing up in a time and place where bigotry is still normalized. She's just a bigot for no other reason than her own ignorance and prejudices.