Jem and Scout's Snowman Passage

In this passage of To Kill a Mockingbird, an allegory can be found. When it snows in Maycomb county for the first time in many years, Jem and Scout decide to make an attempt at a snow-man. To their dismay, they discover that there is not enough snow on the ground to make a full sized snow-man, so they begin gathering snow from their neighbor's yard. Jem decides to make the snowman out of dirt, and cover it with snow. At first, it seems that the allegory that is found here represents the caucasian dominance in Maycomb county. But once the snow and dirt mix, it is a clear allegory representing both races of white and black, and how they can mix and be at peace with one another. This passage can also be seen as forshadowing, showing that one day whites and blacks will be looked upon as equal.