Leo Johnson, a black man, has never received an apology from the Southern Poverty Law Center. Not a word. Which is passing strange for a group that proclaims itself to be “a nonprofit civil rights organization dedicated to fighting hate and bigotry, and to seeking justice for the most vulnerable members of society.” Johnson, the African-American building manager and security guard for the Family Research Council (FRC) was shot and wounded last August 15 by an angry gay activist, Floyd Corkins. Corkins was angry over the FRC’s support for heterosexual marriage. Researching the group on the Internet, he found that...