Gerald Charles Horne is a historian who currently holds the John J. and Rebecca Moores Chair of History and African American Studies at the University of Houston. "Dylann Roof" "Charleston shooting" "South Carolina shooting" "Emanuel African Methodist Episcopal Church" "hate crime" "White terrorism" "Confederate Flag" "racism" "Dr. Martin Luther King Jr" "Civil Rights" "poor people's campaign" "Chair of History & African American Studies University of Houston" "political Affairs Magazine" "white supremacists" "KKK" "neo Nazis"