Good quote there. Unfortunately, xenophobia and group-think are probably built into our brains. Some people say that we cannot end racism because distrust of strangers is part of immutable human nature, or that we must wait till attitudes change before we can change social practices. Both stances merely put off necessary changes into the indefinite future. However, in practice, social attitudes change after policy changes are in place, not before. Consider how attitudes have changed regarding smoking in public, gay marriage, fertility treatments, people working in occupations not traditionally associated with their genders, etc.

Moreover, the problem is not simply a matter of bad attitudes. Practices and policies embedded into our social structure feed on these innate SA traits, and result in systemic racism whether we like it or not, even whether we see it or not. The wealth gap is mainly due to redlining practices, outlawed in 1968 but still practiced de facto today. Justice system disparities generate the school to prison pipeline, the high proportion of incarcerated Black and Brown people relative to the general population, and even the high proportion of incarcerated people in the USA relative to population, compared with proportion of incarcerated citizens in other modern democratic republics all over the world. Disparities in education, employment, health, and many other areas all result from bad social policies that originated in centuries-old racist practices.

That's why we need to examine these structures, listen to the people most impacted, and come up with better ways of running our societies. Otherwise ... as King, said, riots are the voice of the voiceless.