Hin Hurin

[Galadriel55]

Originally Posted by Urwen

So, why? Why did Morgoth curse Hin Hurin, therefore losing one of his chances to learn information of Gondolin location?

I think it's quite the opposite. If Morgoth let them live happily, they'd probably succeed in avenging Hurin (which is not part of Morgoth's plan). If he killed them, Hurin would suffer less - what's the point of that? By cursing them, he (potentially) can get Gondolin's location out of Hurin - if he would ask for mercy for his family, or one of the family would give it away "accidentally" (like, for exaple, Turin gave his location away by fighting with Gurthang, so why not try and find Gondolin through him?). If Hurin actually told Morwen and his children where Gondolin is, Morgoth's plan would have succeeded (Morwen wanted to flee to Gondolin, or like I said above, an "accidental" revealing).