That doesn't really mean that 75% of all Americans made the conscious decision not to be friends with non-whites. The distribution of ethnical groups in the US isn't perfectly random, it's highly locally correlated, they cluster. 63% of the US are whites, but if you go for a walk in your neighborhood as a white person and see 100 people, way more than 63 of them will be white on average. The same applies for any other ethnic group in the States. While that surely is historically based in xenophobia, I think it's unfair and quite frankly more damaging than helpful to claim that every person that has no non-white friends is a xenophobe.Civilization is a very thin veneer and bubbling away underneath is xenophobic tendencies that can easily metastasize when times are bad. Three-quarters of whites in the US don't have any non-white friends. Just think about that.