You bring up an amazingly interesting point. Of the white people who do not show implicit or explicit bias, what makes them naturally different?
Perhaps, as you said, they could have been exposed to diverse family, school, or community environments. I will have to take a harder look at the study to make sure I didn't miss something. If we could find out what made these white people different, that would be really helpful in constructing a system that produces more racially tolerant people.
We have to keep trying to figure it out but I'm confident that during our lifetimes, we will see significant progress on these issues. Thanks for reading. I appreciate you ✨