I agree with your entire statement except in the spelling of stemmed.
Nor does it recognize that not all people believed Blacks were less than human North and South.
In the 1840's or 50's there was a black doctor who lived near New Orleans who was the most sought after doctor in the South. He was also a big plantation owner. Then again that area of Louisiana and Mississippi was different from the rest of the south. There was a small section in Mississippi that attempted not to be part of secession but they were put down by force of arms from the South. It was a mixture of blacks, whites and Indians. The "Gone With the Wind" South was a figment of the imagination. Even though the movie is now banned, "The Song of the South" probably shows a more accurate representation of how life was on a more humane plantation. Also the sequel to "Roots", the one that showed the where the great grand mother came from, was probably fairly accurate also. "Roots" was not very accurate. We can never forget George Washington Carver, he came from somewhere.