Well, I dislike the other summoned one's attitudes more. The fact that you're not bothered with being kidnapped does not mean that everybody is the same as you and wouldn't have problems with being thrown into a random conflict that does not concern them. Plus, even if someone came to me asking for help in defeating the American Army or Jihadists under the pretence that "they wiped the memory out of everyone I ever knew so my potential death is of no importance", that wouldn't make me want to help them. They got into their shit, they get themselves out of it, they don't force outsiders to fight for them. Not to mention that it's a pretty asshole-ish way of doing things.
Really, apart from the long black-haired girl, the heroes also seem quite brainless.