2018/10/05: When white respondents perceived the share of non-white residents in the nation and in their cities to be higher, they tended to feel that they themselves were being discriminated against more. While the actual size of the non-white population in their neighborhood also went hand in hand with this attitude, that association was less strong.
Having diverse neighbors move in seems to have two effects on white Americans. It can affirm that their overestimation of the extent of demographic change happening in the country is correct, and therefore increase the threat they perceive. Or, by giving them opportunities to interact with people who don’t look like them, it can mitigate some of their fears.