Maedhros and Gwindor

[Elemmírë]

Originally Posted by Telcontar_Dunedain

It was Thingol's fault that Doriath was destroyed, not Hurin's.

It was a lot of people's faults. Hurin was admittedly a thrall of Morgoth, unwilling as it was. He says to Thingol,

Receive now, lord, the Necklace of the Dwarves, as a gift from one who has nothing, and as a memorial of Hurin of Dorlomin. For now my fate is fulfilled and the purpose of Morgoth achieved; but I am his thrall no longer.

It can be more than reasonably argued that Hurin unwillingly served Morgoth's purposes. In Doriath to a degree, but especially in Gondolin.

Originally Posted by Telcontar Dunedain

As for the other point's, the Oath of Feanor would not have harmed Morgoth if Maedhros had avaded capture, that was the oath working against the Son's purpose.

Possibly true, but speculation none the less. It's hard to guess what would have been different had he not been captured. I would have to guess that he would not have abdicated... Though the positives and negatives of that is also pure speculation...

Originally Posted by Telcontar Dunedain

And with Gwindor, Beleg being killed was probably to do with Morgoth's curse upon Hurin's kin, as was the destuction of Nargothrond.

You can't refute that Gwindor led him to Nargothrond. If Gwindor had not been there, how could he have found Nargothrond? Theoretically, he couldn't have. And if Gwindor had not been there with him, Turin would never have gained acceptance into the kingdom.

Once again, I'm not saying that any of them were consciously serving Morgoth. All the same, they all seem pretty pivotal in the destruction of a lot of the Elvish kingdoms, and I think it merits consideration...