Anger. Fear. Guilt. Denial. Silence. These are the ways in which ordinary white people react when it is pointed out to them that they have done or said something that has - unintentionally - caused racial offence or hurt. After, all, a racist is the worst thing a person can be, right? But these reactions only serve to silence people of colour, who cannot give honest feedback to 'liberal' white people lest they provoke a dangerous emotional reaction.