Racism in dreams can be quite shocking, especially if you are being racist and it is totally out of character with how you normally view the world.
If you are not normally a racist person having a dream about being racist does not necessarily mean you have hidden race issues, it can just be a sign that you are being overly judgmental to those around you in waking life.
Furthermore, if someone you know is being racist towards you, it does not mean they are closet racists and your subconscious is trying to reveal this to you, it can simply mean you feel they are being too judgmental of you in waking life.
If someone you don’t know appears in your dream and is being racist it can be that this person represents a part of you that is being too judgmental or shallow. Try and remember what kind of person the racist was in your dream, and who they were abusing. If you can remember the personalities or feelings you had for the people involved, it might help you discover which aspects of your life you are being too superficial about.
If you dream you are at an anti-racism rally, it could be that you feel the people around you are too superficial or shallow, or that some aspect of your life has little or no meaning.