Discrimination, racism and intolerance are a lot like holding a grudge. The grudge-holder remains steadfast in their conviction and refuses to understand another point of view or to engage in any type of connection. But what about the stealth grudge-holder? You know--the person that CLAIMS they're not upset but continues to give little jabs anyway.
Multicultural counselors have a name for stealth forms of discrimination. They call it microaggressions and it's very real and quite toxic. As you'd imagine, it's one thing when someone you love or care about is still stewing about an incident while claiming they are over it, but it's a whole other thing when your boss or Chairman of the Board is launching gestures and double-talk at you that are loaded with the equivalent annihilation power of the atomic bomb. Yet you're in a double-bind because nothing has really been said, so you can't prove the existence of the passive-aggressive poison in the room. Worse, the person responsible for such behavior is probably just as unaware. Hence, "micro"aggressions.
Numerous studies have been conducted to reveal how oblivious people are to their prejudices. Perhaps you'll recall the "Candid Camera" episode that showed a woman walking down a street with a purse on her arm as several staged teenagers walked passed her. The teenagers were culturally different but dressed in identical clothes. As you might guess (even though the woman claimed not to be "prejudiced"), the woman placed the purse on her opposite shoulder when she saw the Black and Latino teenagers approaching. Sandra Bullock does a good job portraying a similar scene in the excellent, make-you-think movie "Crash."