I know nothing of her background, but an African-American named Judy Lind contributed a review of "Huckleberry Finn" to Amazon. Her conclusion- "So- is "Huckleberry Finn" a racist book? No. It's of its time and for its time and ours as well, portraying a black man with sensitivity, dignity and sympathy. If shallow, ignorant readers see Jim as a caricature and an object of derision, that's their problem. Hopefully, they may mature enough in their lifetime to appreciate this book as one of the greatest classics of American literature.
Another reviewer, an African-American from South Carolina, on reading "Uncle Remus," found the dialect difficult but ends: "... if you have a lot of patience and love some good stories, go for it."
From these and other comments I have found, I take it that African-American opinion is not uniformly opposed to these works.