Shaunti Feldhahn, a right-leaning columnist, writes the commentary this week and Diane Glass, a left-leaning columnist, responds SHAUNTI FELDHAHN for ajc.com As a kid, I never realized there was a bias against interracial dating -- or that any serious racial bias still existed. Like most kids in the Washington, D.C.-area melting pot, I grew up around everyone from the children of African diplomats to kids who came over on the boats from Cambodia. My classmates spoke every language and lived in everything from luxury lake homes to public housing. Our dinner guests were just as likely to be from Nigeria...