Gandalph wasn't being resigned, he was telling the others that it was too late to be wishing for other things and too late for denial, the war was on, like it or not and they had to destroy the enemy to survive.
Just like now.
The world war isn't hot, yet, but it is on and can not be stopped. We will have to fight or we will be destroyed.
And like the story, our enemies are legion and our allies weak to nonexistent.
Worst of all are the traitors within.
Thank you. Agreed.