History matters Outsider77. Obviously, white people have the legal right to enact the white supremacist ritual of blackface but the question is should they?
"The minstrel show, or minstrelsy, was an American form of entertainment developed in the 19th century. Each show consisted of comic skits, variety acts, dancing, and music, performed by white people in make-up or blackface for the purpose of playing the role of black people.
Minstrel shows lampooned black people as dim-witted,[1] lazy,[1] buffoonish,[1][2] superstitious, happy-go-lucky,[1] and musical." 
https://en.wikipedia.org/wiki/Minstrel_show