Antebellum is a movie built on a good intentions, and yet it frequently talks down to its audience in an infuriatingly smug manner. It’s a movie built around a single big reveal that’s meant to impress upon you a reality that you’re probably already aware of. The film wants to stress that America’s original sin of the slavery remains with us, but puts so much emphasis on a big reveal that it misses both the human stakes and our present miseries with regards to racial injustice. The cruelest cut of all in Gerard Bush and Christopher …