If this article were to be published as a book instead, it would be different because it would most likely include many more examples to give us the same sense that the author is trying to give us in this article

This line creates a dark tone that illustrates the story both to give the readers a serious sense of what is going on as well as to describe "Uncle Tom's Cabin."

I think that the author added this paragraph in order to show how people of all races see black children as less innocent and provides examples of how and why