Is There a Difference Between Race and Diversity?

In today's climate, i wonder how comfortable it is for people to even mention that they used to have out dated beliefs. It did make me think that maybe i came from a culture that had some deep seated races beliefs. I think about the beliefs that my parents had a bett race when i was growing up, compared to what he was at the very end of his life. So there's some hope here. If we could begin to ward people for telling stories of how they used to believe x, but now they believe why?