In 2006, Publix Supermarket Charities donated almost $30 million to causes that included Habitat for Humanity, the March of Dimes and United Way. But Al Piña isn't satisfied. Mr. Piña, the chairman of the Florida Minority Community Reinvestment Coalition, believes Publix isn't giving enough to people of color who donate to other people of color. Welcome to the latest trend in racial extortion.

According to a study that Mr. Piña commissioned from the California-based activist group Greenlining, Publix gave...