"His mother was a strange, fey woman"
<span>In Chapter 2, the author comments that the fate of Ikemefuna is a "sad story" that is "still told in Umuofia unto this day."
So Okonkwo tells his sons sad stories</span>
This Sentence is written correctly.
I have never read what you are asking, but just by looking at it, I would assume that he is stereotyping Dutch people, because he is calling Black Dog an insult, which is "son of a dutchman".