The Miley Cyrus kerfuffle, with people complaining she "appropriated" a black dance style and is "exploiting" her black backup dancers is an interesting example of how some people just hate it when white people dance like or with black people.
Noah Berlatsky at The Atlantic added that white people shouldn't sing like black people when he complained about Janis Joplin.
I may have first noticed the curious hatred of miscegenation by many anti-racists in the Save the Pearls kerfuffle: the book is about an interracial romance, yet it was denounced as racist. I suspect some of the people who denounced it have also complained about the shortage of "eligible" black men and about white women "stealing" black men, but I haven't bothered to verify that.
Is anti-racism the love child of the Nation of Islam and the Ku Klux Klan?