Why is cecil jacobs mean?

Cecil Jacobs lived at the far end of the street next door to the post office. He insulted Atticus for defending Tom, Scout beat him up for it. Cecil reflects the general feelings of white members of the town. He sees prejudice as acceptable and this comes out through the filter of a child.

He insulted Atticus for defending Tom, Scout beat him up for it. Cecil reflects the general feelings of white members of the town. He sees prejudice as acceptable and this comes out through the filter of a child.