Ok, I get that the context could be of importance to enjoy a movie, a comic, a book, a videogame... It gives you some sense of familiarity or immersion. I get it.
What I cannot fathom is why is such a big deal when you change the colour of the skin of the character, the sexual option or the gender and not when you change eye colour, hairstyle or the accent.
I mean, Constantine is supposed to have a heavy ET British accent, and there wasn't a campaign against Keanu Reeves when he played this character in the movies or when DR who was portrayed by a man with a heavy Scottish accent; no one that made them close the Instagram and Twitter accounts the same way it happened with other recent cases because of the massive trolling.
ED: Not ET British, more of a cockney accent, they told me =P Still not how Keanu did it. And I do not say he acted poorly. I´ve seen worse. Gabriel knight games, anyone? Fantastic games, but you want to kill the MC after the first 10 minutes putting up with his fake southern-USA accent.