It seems like so much focus, in media discussions, on race relations is a losing political strategy. Much of the focus is on African American / White relations while African Americans are only 13% of nationwide population.
Hispanic Americans are a much larger segment. Whether these type of discussions motivate the vote among Hispanic Americans is an important thing to consider.
There are a lot more potential voters who are Hispanic and it doesn't necessarily follow that the same issues motivate all minority segments of the population with the same enthusiasm.
Black / White relations has a long history, in this country, going back to slavery, segregation and so forth. An increasing number of recent immigrants have different stories, histories and reasons for arriving in this country. One may not always be able to count on the Hispanic vote to be motivated in similar ways to most of the African American vote, or the segments of the White vote that have been brought up in universities with the long history and discussion centered around Black / White relations.
From what I understand, it does seem like the black vote is still quite reliably loyal to the Democratic Party, but that loyalty isn't necessarily guaranteed. Loyalty among other ethnic groups is far less guaranteed.
Seems like the Democratic Party could improve it's outcomes if it shifted some of the focus of its discussion more toward the big issues around climate change and how to build a sustainable economy.
The black / white discussion still has bearing on these issues; for instance there is the problem of so much land devoted to single family zoning and it is useful to remember the racial foundations of early exclusive zoning laws.
Figuring out how to build a more sustainable world in terms of climate, housing, city planning, technology, transportation, health, lifestyles and the economy could draw enthusiasm across wide segments of the population.