So is the book "Huckleberry Finn" racist or is it a contemporary [19th century] book commenting on the racism of one Huckleberry Finn in the book "Huckleberry Finn"?

One should no judge past works by today's values alone. Huck was taking advantage of a slave which even at that time was racist. To bring the issue to the public forum the book was written. Does that make the book racist or abolitionist?

The two lines in the movie reflect the time that it was made. That characterization does not appear anywhere else in the movie. Does that make the movie or the song racist? If so then the US Constitution is racist because it discussed the 3/5 rule. By that logic the Constitution should be destroyed because it is unAmerican.

Sometimes things are just as they are without reinterpretation or revisionism.

All of that is very much off topic. The topic is the deletion of the deleted thread.