I think the characteristic that I would use would be "sheltered". He passes judgment on others without realizing the consequences because he has lived a sheltered life; his limited experience leads to a limited understanding of differences. Or perhaps a better word would be naive. During the course of the novel Torey learns to look beyond appearances, and he progresses from a proud and self-centered boy to a mature and sensitive young man. So I guess at the beginning of the novel I would call him naive, and by the end, he figures out more about himself and the world around him.