Man to Man in Araman!!!!!

[Nilpaurion Felagund]

Now, to refute you.

Let's analyse the events. Finarfin sees Kinslaying. He could have reacted in two ways.

1. Leave the host to that maniac who just killed his kin. Think what more Fëanor could do in Middle-earth, with himself as king.

Soldier: Our air wing has been lost.
Fëanor: I don't care! Anyone who doesn't attack is a coward!
Soldier (mumbling): Great...

Yes, I know there is no air wing in Arda during that time, but you can substitute anything - a tactician, the archery backup, or a cavalry assault force.

With his depraved state of mind, he could annihilate the entirety of the Noldor! With only Fingolfin to stop him! I don't think he could have lived with that, therefore he did #2...

2. Stay with that maniac in hopes of using your cool, calm, collected mindset to push possibly debilitating actions slightly.

If all else fails, use overwhelming majority to push actions. Fëanor and his sons aren't scared of just a majority. Their handful ravaged the Havens of Sirion. So you'll need to overwhelm them, in case something goes...wrong.

Cute understatement.

Then, the Doom of Mandos. Great. Now, his only reason to go on is zapped. No matter what he and his brother can do, tell, or sing to Fëanor, all will go wrong. Why waste all your people in a hopeless quest?

He went back. Not a wimpy decision.