Mathilda also made it abundantly clear that her reason for going to war was because Ohnar West didn't deserve to exist and she was going to see to it that it ceased existing. I think at one point she even said that it didn't matter what they did to the one noble that sold food to Kindara, she'd go to war anyway.
They grow up so fast. But yeah, OW deserves to be wiped clean from the face of the earth. It's an annoyance in the greater scheme of things, like the Arcaean Empire
.