Well, yeah. A lot of racists never get to know the people they claim to hate as actual people or even interact with them beyond the most superficial encounters (passing one on the street, having one hand them change change at the store, etc). They even tend to stick to media which leaves them comfortable in their world view. Getting them out of their comfort zone is crucial for change (likely true for everyone really). Not everyone will change either. There are some remarkably stubborn people, but the only chance any of them have involves them being confronted with information outside of the narrow echo chamber they live in.