If you make your character witty, or perceptive, or peculiarly thoughtful, readers realize that he may behave erratically but something worthwhile is underneath. If you let readers understand the circumstances that created his personality, so that his vices or crimes are understood as reactions to things that were done to him, sympathy results. That doesn’t mean readers will approve of his acts, but it does mean that they may care what happens to him, hope he mends his ways, are saddened by his setbacks, and feel that the experience of knowing him through fiction has been worthwhile. In Wright’s tragic novel, Native Son, the main character keeps doing things that make readers think, Oh no. Don’t do that. But Wright provides an understanding that keeps readers emotionally engaged even as they are shocked.