The humans did not want to believe in helper and that's why she wanted to give them war. Without damaging them completely it is ironic but true. the love for you made her grow and only the hope of having you back in her arms made her keep going. And I really like that Madeline and Lars are also there play a very fundamental role in our history. It is beautiful as the love of a machine surpasses the love of a human being and is much stronger.