One of social psychology’s great lessons is that prejudice decreases with friendly social contact between people of equal status, while minimal contact sustains prejudice. In today’s world, anti-immigrant sentiment in both Germany and the U.S. runs strongest in states with the fewest immigrants. West Virginians, whose state has the lowest proportion of undocumented immigrants, have been most likely to disagree that “the growing number of newcomers from other countries strengthens American society.”
I also like his phrasing here, re "great lesson" we've learned from #IntergroupContact