Acrimony with racial overtones has plagued the advisory council. The key issue: whether meetings in Spanish should be allowed.For months, parents on a Los Angeles Unified School District advisory council have disagreed over whether their meetings should be conducted in Spanish or English. Such arguments became so abusive that district officials canceled meetings for two months and brought in dispute-resolution specialists and mental-health counselors. But Friday morning's gathering of the District Advisory Council proved dysfunctional in any language. By one vote, parents censured their own chairman for alleged bad behavior, leading to a walkout of most Spanish-speakers. The rebuked chairman,...