Rich People and backward Thinking

Alright so I'm reading a book named "The Great Gatsby" by F. Scott Fitzgerald. It occurs to me that some of the characters are sexist and/or racist. Tom is a good 3xapmle. He often cuts his wife's sentences in half, is rude to her, and he physically and possibly emotionally hurts her. Daisy (Tom's wife) shows Nick (the main character) her bruised hand in which she says that Tom did it. Tom also shows that is a racist by saying "The idea is if we don't look out the white race will be- will be utterly submerged" in which he is talking about a book called "The rise of the Coloured Empires". Later he says "It's up to us who are the dominant race to watch out or these other races will have a control of things.". Tom is saying that The white race is the ultimate race and that they need to be careful or else the other races will take over. He demonstrates the definition of racism which is the belief that one race is superior than others.