For the more extreme effects, involving unstable peple, we see a lot of this in the news lately, most recently this weekend: https://www.cnn.com/2019/04/06/politics/ilhan-omar-new-york-...

For everyday workplace/community culture, we in the US have a long and ongoing history of biases and poor treatment (including in the workplace) of people belonging to identifiable groups that have been singled out as somehow threatening or lesser. Maybe the pattern repeats. Or maybe the pattern doesn't repeat this time, but many people in the group fear it will, and that's not good for workplace/community either.