Here, as in “Lincoln,” black people—with the exception of the protagonist and his love interest—are ciphers passively awaiting freedom. Django’s behavior is so unrepentantly badass as to make him an enigma to both whites and blacks who encounter him. For his part, Django never deigns to offer a civil word to any other slave, save his love interest. In a climactic scene, Django informs his happily enslaved nemesis that he is the one n-word in ten thousand audacious enough to kill anyone standing in the way of freedom.
Is this how Americans actually perceive slavery? More often than not, the answer to that question is answered in the affirmative. It is precisely because of the extant mythology of black subservience that these scenes pack such a cathartic payload. The film’s defenders are quick to point out that “Django” is not about history. But that’s almost like arguing that fiction is not reality—it isn’t, but the entire appeal of the former is its capacity to shed light on how we understand the latter. In my sixteen years of teaching African-American history, one sadly common theme has been the number of black students who shy away from courses dealing with slavery out of shame that slaves never fought back.
It seems almost pedantic to point out that slavery was nothing like this. The slaveholding class existed in a state of constant paranoia about slave rebellions, escapes, and a litany of more subtle attempts to undermine the institution. Nearly two hundred thousand black men, most of them former slaves, enlisted in the Union Army in order to accomplish en masse precisely what Django attempts to do alone: risk death in order to free those whom they loved. Tarantino’s attempt to craft a hero who stands apart from the other men—black and white—of his time is not a riff on history, it’s a riff on the mythology we’ve mistaken for history. Were the film aware of that distinction, “Django” would be far less troubling—but it would also be far less resonant. The alternate history is found not in the story of vengeful ex-slave but in the idea that he could be the only one.
How Accurate Is Quentin Tarantino's Portrayal of Slavery in Django Unchained? : The New Yorker: