Primarily because it's hard to define and understanding it can be even harder. For example is racial self interest racism? How dark or light must one's skin be to be Black or White? Is hatred for a race the same as racism if it does not spring from a belief in racial superiority? If I hate black people because they commit more crimes in my neighborhood, is that racism? Racism is a belief in racial superiority and we just people beliefs by their actions. However, actions are not always based on a belief.
I think those questions are fairly easy to answer and get to a common consensus when viewed through the lens of historical racism in this country.
That's where too many whites fall short, they choose to forget history, or pick and choose when to start the history.
9 times of 10 they seem to choose a historical point where they perceive blacks being the benefactor or aggressor, depending on the specific topic at hand.
Do you find this to be an accurate statement, or totally false?