Several years ago, when I asked my father about racial attitudes when he was a boy in Kansas City in the 1920s, he named the street that divided the black neighborhood from the white.
Then he recalled standing on the white side of the street, listening to great boogie-woogie piano being played on the porch of a house on the other side.
A dime, he knew, was the price of admission. For 10 cents, he could have crossed the street, entered the yard, stepped onto the porch and joined the crowd of African-Americans moving to the joyous music.
Why didn't he cross? This good and generous man who loved music and never uttered a bigoted word said simply: "People stayed with their own kind."
A year ago in my south Minneapolis neighborhood, long divided by race and the canyon of Interstate 35W, two groups of neighbors nearly came to blows over a proposal to build a dog park in Martin Luther King Park.
Black elders from east of the freeway linked arms and sang: "We shall overcome." Black activist Spike Moss fired off the "racist" missile.
Dog owners, mostly white residents from west of the freeway, were baffled, hurt and angry. The Park Board quickly retreated to seek less dangerous ground for Fido to play.
After such race-based conflicts, the usual pattern is for the two sides to draw back to our camps. We mutter complaints and await some new offense to fuel old hurts anew.