Morgoth and Doriath

[Raynor]

Originally Posted by William Cloud Hickli

But that 'version' of events was Christopher's invention

It wasn't necessarily an invention, since there is a variant of the story where Hurin takes the necklace, casts it before the king and reproaches him.

in any event the doubly-cursed Treasure of Nargothrond is what precipitates the strife with the Dwarves.

I am not aware that Morgoth cursed the Nauglamir. Anyway, I believe you are now arguing along my line of reasoning. A curse is a seed of evil which develops rather independently, and is different from saying that this chain of events was planned by Morgoth.