You understand me. I am truly sorry if he told you you could come over. He cannot study with you. The way this mother treats Elena is truly shocking. She treats Elena like she is nothing more than a stray dog and has her feelings are the equivalent of a twig.
Children look to adults for direction in how to act and treat others.
If adults don't treat people of all backgrounds with respect then the children will learn to follow that example. Children are perceived as innocent creatures. Yet, when they are forced to experience prejudism they can quickly lose that treasured innocence. After the harsh words she has experienced throughout the day she is beginning to turn inward. She is building a wall to make herself hard and cold like the falling snow.