It seems that Luther was not meant to be black:
John Luther was not originally written as a Black character, with showrunner Neil Cross previously saying: “I have no knowledge or expertise or right to try to tackle in some way the experience of being a Black man in modern Britain.
“It would have been an act of tremendous arrogance for me to try to write a Black character. We would have ended up with a slightly embarrassed, ignorant, middle-class, white writer’s idea of a Black character.”
It is utter bollox isn't it...?
Why not just write a character and then pick the best actor to play the role...?
Does it matter if the actor they chose has a high Melanin level? I don't think most people care...
But no, he has to be stereotypically black with black friends and eating black food... No doubt there would be complaints if a white actor was chosen and he didn't skoff fish & chips all day...?