Every kind of "deviding" people is not racism, and it is natural to devide people, because we are not all the same, and we will never be.
For example economic classes of society: its something thats inevitable, as everone has their function in society, and of course those who do more responsible and demanding functions will be rewrded for all their work, educatiot, doctors, scientsits for example. We can not all be the same, but that does not mean we should act more worthy than others, because we're all human beings, and for me racism is just a sign of stupidity.