Ethnic notation thoughts

I found it very interesting that white men played black men in movies.  They would dye there skin black with coal and act like a black man would have.  What surprised me though was that when they had black's act they had to dye there skin too.  The movie producers wanted them to look as dark as possible and act like a stereotypical African American.  They would even paint big lips on these black actors because that was how they were portrayed in many popular comics or books.  When a African American acted on a show they would not let him act normal they would make them portray the the typical black stereotype.