In some cases, you are correct. For instance, if I am hiring someone to sell cars, I need a person who I can expect to be liked even by the most racist people.
But say that I am only slightly racist. If I knew you were Black, I probably would not go out of my way to say high to you. But once we are having a conversation it's easy for me to relate to you and my prejudices are more likely to be overridden.
I'd start with how good they are at sales. If you sell twice as many cars to everybody else, then why should you care if there are some bigots who don't buy your cars.
But say that I am only slightly racist. If I knew you were Black, I probably would not go out of my way to say high to you. But once we are having a conversation it's easy for me to relate to you and my prejudices are more likely to be overridden.