Hypocrisy, thy name is Liberal.
There are two groups of such lunatics. One is an arm of the red menace, relentlessly worky to discredit, defame, and ultimately destroy all vesitiges of our culture. I think this guy is one of those. The other group , true bona fide gnumbskulls who are often unwittingly (talk about a double entendre) used to great effect by the former group, never grasp that the work is a brilliant satire of the highest order. Twain's treatment of Jim—arguably, the ONLY truly noble and and consistently just character in the entire work—is an INDICTMENT of slavery and the prevailing attitudes toward race in American at that time.
Kipling has fared even worse over the years and for the same reasons.
Give it time and Graves, Owen, Sassoon, et al., will be gone for their "glorification of the horrors of war" [sic]. In due course, I suspect Shakespeare and Homer will meet the same fate, too. Fables, parables, analogies and the like have no instructive value in the minds of such folks, because intrinsic morality and civility have no worth in their ideal of a mono-everything-matic “flat-line” society.
Meanwhile, The Color Purple, My Three Gay Dads, and all things Judy Blume are shoved into my third-grader’s mind daily.
While they're busy banning Huck, let us make sure we remind them to go after Twain's writings on jingoistic America and the subjugation via colonialism/"Empire Building" of its Spanish-American War “prizes,” too. (/rant)