You are free to not agree with Mir's stance, but you just plain can't deny that the majority of humans in the Ar Tonelico world are DICKS and while she's going to extremes, she has every right to be pissed at them.
I mean, for God's sake, they basically practice legalized slavery of cute girls, and there's massive mistreatment involved in a lot of cases. I'm sorry, but going homicidal on humans because they, as a whole, treat your race like tools is nothing more than giving them a taste of their own medicine. See how THEY like being on the receiving end of coldblooded abuse, maybe they will learn something.
Har, as if. I just can't muster any sympathy for the vast majority of humans in AT games. They do way too much bad shit way too often. And Mir herself is a product of their being dicks. All it'd have taken, as Lyner proved, was kindness. But no, most of humanity insisted in being dicks. Well, that's comeuppance for it. Learn to be less dickish next time.