Just when it seemed the progressive activists at the Southern Poverty Law Center (SPLC) couldn't become any more ridiculous, they did just that last week when they breathlessly declared a new set of "antigovernment extremists" threatening America: parents. SPLC's deliberate smearing of parents' rights advocates was front and center in its latest annual report. Its "Hate map" lists numerous parents' rights groups, including my organization, Parents Defending Education (PDE), alongside such groups as the Ku Klux Klan. A closer look reveals that SPLC characterized its "antigovernment extremist" designees as "reactionary anti-student inclusion" groups that "spew homophobic and transphobic speech in...