Mending Wall

Mending Wall raises the question "Why do good walls make good neighbors?" and gives hints to several reasons why. When the neighbor is asked Why fences make good neighbors, he exclaimed that it was the way his father went about it, never really giving a reason to continue this when it seems really unecessary saying that"My apple trees will never get across
And eat the cones under his pines" because those are the only things there.

The writer is dissillusioned into helping build this wall thinking he is being nice which makes him a good neighbor when actually he is helping someone who wants to make sure that the writer doesn't bother him. This could possibly be a hint towards racial discrimination, because he still follows the ways of his father, who during that time, probably didn't look upon blacks as respectfully as they would now, so the neighbor continues to build this wall coincidentally with the help of the neighbor because he is following his father's racist ideals.