Arataniello, on 18 December 2012 - 08:02 AM, said:
The emnity between Dwarves and Woodland Elves in the 'book universe' stems initially (and exclusively?) from the destruction of Doriath in the First Age. In order to make the friction more immediate and explainable in the films, I am guessing that they had to make the source of the emnity more current, without resorting to another flashback.
It comes both from the destruction of Doriath by the Dwarves and from the fact that the Elves didn't lift a finger to help Moria when they awoke the Balrog - though I wouldn't blame the Elves for that. So both sides are quite pissed off at the other.
PJ basically changed the source of dwarvish bitterness from the fall of Moria to the fall of Erebor.
Edited by Clueless Northman, 18 December 2012 - 10:03 AM.