SUBTLE IS THE NEW BLUNT
The thing to realize and know is that racism isn't summed up by just people being involved in the KKK, or the fear of black people and predominantly black neighborhoods, or stereotypes and prejudices, or saying the n-word, or not being associated with "those kind of people", the examples can go on. But the thing to know is racism is a complexity of feelings, intentions, physical gestures, exclusion that may or may not be purposeful.