Once someone learns about genetics, develops strong empathy, and isn't tied to dogmatic views of race
Ethnic diversity reduces happiness and quality of life. http://onlinelibrary.wiley.com/doi/10.1111/j.1467-9477.2007.00176.x/abstract;jsessionid=279C92A7EB0946BBA63D62937FC832A9.f04t03
Diversity reduces trust, civic participation, and civic health. http://www.boston.com/news/globe/ideas/articles/2007/08/05/the_downside_of_diversity/?page=full
Ethnic diversity harms health for hispanics and blacks. http://ajph.aphapublications.org/doi/abs/10.2105/AJPH.2012.300787
Diversity primarily hurts the dominant ethnic group. http://www.theindependentaustralian.com.au/node/57
Ethnic diversity reduces concern for the environment. http://link.springer.com/article/10.1007%2Fs10640-012-9619-6
Ethnic diversity within 80 meters of a person reduces social trust. http://curis.ku.dk/ws/files/130251172/Dinesen_S_nderskov_Ethnic_Diversity_and_Social_Trust_Forthcoming_ASR.pdf
Ethnic diversity directly reduces strong communities. https://www.msu.edu/~zpneal/publications/neal-diversitysoc.pdf
Ethnically homogenous neighborhoods are beneficial for health. https://www.mailman.columbia.edu/public-health-now/news/living-ethnically-homogenous-area-boosts-health-minority-seniors
Diversity in American cities correlates with segregation. http://fivethirtyeight.com/features/the-most-diverse-cities-are-often-the-most-segregated/
Homogeneous polities have less crime, less civil war, and more altruism. http://www.theindependentaustralian.com.au/node/57
States with little diversity have more democracy, less corruption, and less inequality. http://www.theindependentaustralian.com.au/node/57
then they realize diversity is fucking horrible for western society.