The civil rights leader Andrew Young, who was hired by Wal-Mart to improve its public image, resigned from that post last night after telling an African-American newspaper that Jewish, Arab and Korean shop owners had “ripped off” urban communities for years, “selling us stale bread, and bad meat and wilted vegetables.” In the interview, published yesterday in The Los Angeles Sentinel, a weekly, Mr. Young said that Wal-Mart “should” displace mom-and-pop stores in urban neighborhoods. “You see those are the people who have been overcharging us,” he said of the owners of the small stores, “and they sold out and...