This does go to the heart of our times. I know. I live in California. (And I write this post periodically, because it is still true and still matters.)
You see, in California in the 1990s, the state was very close to its own racial tipping point, reached in 2000. No "racial" group forms a majority here. And guess what? We're fine!
We were not fine in the 1990s. I wasn't just blowing smoke when I was running around telling funders they had to pay for voting rights and citizen participation projects in the state -- that we were becoming the new Alabama. During that decade, the shrinking white majority repeatedly tried to hold off demographic change by popular vote.
In 1994, we voted that we hated (Mexican-origin) immigrants and wouldn't provide those people education for their kids, health care, or other social services. (Fortunately, federal courts mostly said "no" to these attempts by the state to preempt national law and policy.) In 1996, we voted to outlaw efforts to ensure that all groups got a fair chance at public higher education; wouldn't want white prospective students to have to compete with those people. That ban on the affirmative action is still in place and diversity in the University of California system has not yet recovered. In 1998, we voted to ban multi-year bilingual education. Wouldn't want to coddle those people. Let'em speak English, even if they are kids and just arrived.
But demographic change marched on. And though those people are still a minority of the registered electorate, those people voted for Democrats near unanimously. And enough whites also voted for Democrats, so the California Republican Party became vestigial, annually searching for some way to "reinvent" itself. And now the state mostly tries to undo the damage from those years and stumble toward a sustainable future which is going to take the best efforts of all of us.
California is no paradise of racial harmony. Our police departments still kill young people of color with little pretext; they just killed an inoffensive Guatemalan immigrant in my neighborhood last week.
But we're over the hump on demographic change. People struggling to get there in the rest of the country should look to California and feel hope. Change is hard; there have been and will be more casualties. But change very well may not take as long as it looks as if it might from where we are stuck today.