The road goes ever onward, and the lore goes ever deeper. I highly recommend Andy Serkis' reading of The Silmarillion on Spotify if you want the full deal.
TLDL is Feanor and his family did some spicy things in Alqualondë in his pursuit of Sauron's boss Morgoth.
Imagine how enraged Feanor must have been, he the greatest of all elves, having been thrice denied a single strand of her hair while she gives some stinky dwarf three.