Earlier quoted context omitted.
For example, treating a coworker poorly because of what country they're from, or what religion. Or worse, especially when unstable people get riled up by right-wing outlets.
You seem to be making a lot of baseless assumptions about this topic
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.