Nope, Brit. black actors playing African-American parts, isn’t “Scarlett Johannson playing Nina Simone”, anymore than Brit. white actors like say, Pierce Brosnan, an Irishman, playing James Bond, a Welshman (although it still might be an important difference to Brits, even if we don’t care)!
And what other ethnicity goes around making a fetish of being Jewish, Italian, German, Thai, Sioux, Nigerian, whatever… enuff?!
BTW, dunno if you’ve heard the suggestion by conservative black scholar Thomas Sowell, that so-called “black culture” isn’t ‘original’ or even unique anyway, and was actually ‘inherited’ by the slaves from the poor southern white culture of the ante-bellum South.
Based on his thesis about the origins of the “black ghetto” culture, Sowell argues that black ghetto culture, which is claimed to be “authentic black culture”, is actually a highly dysfunctional white southern redneck culture which existed during the antebellum South. This culture came, in turn, from the “Cracker culture” of the North Britons and Scots-Irish who migrated from the generally lawless border regions of Britain.