For decades, it has been the most infamous title in the Disney Vault—a film so heavily guarded that it has not seen a commercial release in the United States since 1986. Song of the South, the 1946 live-action and animated hybrid film, has been entirely erased from The Walt Disney Company’s official catalog due to its highly controversial, idealized depiction of the post-Civil War American South. Credit: Disney For years, the mandate from the ve…