Could anything be more insulting to a character described as the son of the Raja. An Indian man who rebelled against British imperialism.
And no, that is not my subjective interpretation of the character. It is explicitly how Verne writes the character and how Nemo - Prince Dakar son of the Raja- describes himself in the novel.
Of the films I've seen, only "The League of Extraordinary Gentlemen" and the '61 version of Mysterious Island with Herbert Lom really made an effort to cast an actor who even remotely fit the characterization Verne wrote.
Also, in the 70's Omar Sharif played Nemo. I've not seen the performance, but He definitely would look the part, except in the photos, he's in his 40s, which doesn't match up with what Verne wrote.
And even though he fits the list of white British actors, James Mason has always been one of my favorite Nemos, right up there with Herbert Lom.
Of all the actors who played Nemo in Mysterious Island, Lom's probably been the best. Not only did he look the part, he was also playing Nemo as an older man, which fits the context of the book that Nemo's crew has all died off over the years, and he's the last survivor. Lom's version wasn't at the end of his life, as he was in the novel, but at least an effort was made to age him.
I remember James Mason's Nemo. Mason was swarthy enough to *possibly* pass as Northern Indian.
Oh, interesting little bit of trivia, Verne wanted to design Nemo as a Polish prince whose family was destroyed by Tzarist forces. The publisher didn't want the French government (which had just signed a treaty with Russia) to come down on his company. So, he changed it to someone the French government at the time could accept.