Blackface
Blackface is a form of make-up that was used in "blackface minstrelsy", which reached its peak popularity between 1850 and 1870.
History
Intended as comic entertainment, blackface minstrelsy was performed by a group of white minstrels (traveling musicians) with black-painted faces, whose performances included racial stereotypes.
Today, blackface make-up is considered very politically incorrect and offensive by many (but not all) blacks and "woke" whites, and it may destroy an individual's life if it is discovered that the individual used blackface make-up many decades ago, even if no racial stereotype was enacted (β cancel culture).
Depicting Whites negatively, such as in "redneck", "white trash", "hillbillies", and skinhead stereotypes, is considered politically correct, another example of politically correct double standards.