It is always a matter of nice judgment how far one respects historical context and how far taste or changed circumstances demand emendation. A character in Northanger Abbey uses the phrase "rich as a Jew", but he is explicitly an unpleasant fool so it appears that Jane Austen disliked the phrase; but surely nobody would take it on themselves to alter the title of Joseph Conrad's novel about the seaman who served on the 'Narcissus'? On a related point: when I reviewed folk records and books for The Guardian, The Times, Folk Review &c, I remember denouncing a new disc by Frank Harte the fine Irish singer for including a song which gloated about 'all the dead khaki soldiers in Erin-go-Bragh', which seemed to me unacceptable at the height of the Troubles in the mid-80s; but now we have a thread on this very site trying to identify the best Irish rebel song...