Makes a lot of sense to me.
"The army's no match for NORA!" says Snow to Hope, who gets very angry at that point because, obviously, the army effectively killed Nora. Hope's interest in why the group was called NORA in the first place - he asks Lightning because it's his mother's name. And when he's told what it means, he gets angry. This is all to do with NORA having the same name as his mother: It gives Hope even more reason to get angry at him, even more reasons to want to kill him.
