I think a lot of people overreacted to the whole, "Black Hermione" thing. Rowling was like, "hey, I think this woman is a great actress, and the race of the character isn't important to the story." I think the reason why another black actress is being cast in the Broadway version is because the same girl who played Rose in the original is continuing with the play.
I'm more annoyed by the whole "Indian Harry Potter" thing, because as one tumblr user put it (an Indian girl, I believe), people in their quest to be all inclusive are ignoring Indian culture -- they're only changing his skin color, and not realizing that it would change a lot of his experiences growing up. It would also have affected his father's experiences and personality as a minority as well, at least among muggle borns.
I mean, if people want to think of him that way in their heads, that's all find and good. But I think people are so eager to be all inclusive that they forget that often means the story can change.
Of course, that's just my opinion -- I could be wrong.
To satisfy the oppressed zoophiles, they should also include a scene where Dumbledore's brother uses "inappropriate charms on a goat" like he's mentioned to in the books.
Is Dumbledore even in a relationship with Grindelwald at this point in the story? If Dumbledore and Grindelwald had a scene with a lengthy passionate tongue-kiss before they whip out their wands and start at it, they'd still be complaining about gay erasure.
IIRC, they never really were in a relationship. It was more like Dumbledore had a crush on Grindelwald who used that to manipulate him.
According to
Mugglenet, it seems their relationship could possibly be addressed later on. Which is cool, not because he's gay, but because it'll tell us more about the two characters and their backgrounds.