La capanna dello zio Tom

Never having read the original work,I don't feel qualified to comment as to how closely this adaptation follows the story.Nonetheless,I feel compelled to comment as to some of the casting. Bruce Dern has always been known,especially during the 50s,60s,and 70s,for his portrayals of lunatics,psychotics,and psychopaths.His villains were the most vile and loathsome that could be imagined.Repulsive is perhaps too kind an adjective.In later years,he mellowed his image to a great extent,playing quirky,off-beat,and eccentric supporting roles.So why,in this film,does he portray the tender,loving,sensitive Mr. St. Clare-unless they really wished to cast him against type?if that's the case,they really did a great job. And Edward Woodward's image is that of a suave,polished,sophisticated gentleman and man of the world.Even as a villain,he wouldn't be rude or vulgar.And Legree is one of the archetypal American brutes.The coarseness of Richard Boone or Neville Brand is necessary for this character.Was the director out of his mind when casting this part?