Morgoth and Doriath

[William Cloud Hicklin]

The best that Hurin achieved inside the girdle, in accordance with what Morgoth planned, was to insult the king. But even that failed rather miserably, since the king restrained himself and Melian freed Hurin.

But that 'version' of events was Christopher's invention; in any event the doubly-cursed Treasure of Nargothrond is what precipitates the strife with the Dwarves.

[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.