The fact that these volumes were "lost" suggests to me that there are "new" tales in these pages.
Other Disney fairy tale moves were based on other sources like Charles Perrault (Cinderella and Sleeping Beauty). Grimm also have variants of these tales, but they are significantly different.
Until they find out the new tales are about a story teller that let politics ruin all the good stories.
It is probabaly unavoidable that a retelling of a folktale will reflect the biases of the storyteller. It is just that politics which align with ones own tend to be invisible. Like when having a black stormtrooper is considered political but a white isn’t.
We also see what happens to certain black men in the world, during “Song of the Roustabouts” (“when other folks have gone to bed / we slave until we’re almost dead,” “boss man hounding / keep on pounding / ‘grab that rope you hairy ape’”)
Afterwards we see the cruel and arbitrary nature of those who mock the poor kid, contrasted to the universal experience of family (“Baby mine don’t you cry”). Eventually the kid ends up with a bunch of (black) crows, including one Mr. “Jim Crow,” who make fun of him, before his buddy from Brooklyn calls them out on how people make fun of them for being different too, and they feel real bad; after finding friendship there, he earns social acceptance for his athletic feats (flight) and later through participation in the armed forces (“Dum-bombers for victory!!” read the newspapers.)
You sayin’ that this isn’t about race at all, and the whole storyline is just a coinkydink? Ha! Tell me another one. Disney’s been at this stuff for longer than your parents have been alive.
They mention the prints are unique and presumably the footnotes they found are ... but I agree, the question of content is surprisingly not mentioned at all.