Discussion - Who was responsible for the Distruction of Gondolin?

[Joy]

This is just an interesting story. I can see several people being responsible, and each seem to carry the weight equally.

I can argue Turin, as he seems to have death and distruction following him everywhere he goes. I can also see it as Turgon's fault, being king and leader of the people. He did some umwise things. His sister, Aredhel, could hold some blame as she left the protection of the city. Also, her husband Eöl, holds some responsiblity. We could also though in Maeglin, their son, who fell in love with his cousin Idril. He betrayed the city when he was captured by Morgoth's spies.
How does Huor and Hurin come into play. Do they hold some responsibility?

With so many people acting in this story, it is hard to lay blame anywhere, yet if this were a court of law, guilt would be placed upon a person. So who would be found guilty?