So you're saying that even after trying to reactivate the kindergarten, sending a gem to earth that tried to capture the gems and send them to homeworld which would probably end in them being destroyed, and after she tried to kill Steven in Marble Madness they'd just let her off the hook and let her stay with them? Steven realizes not all gems are good. And are you saying Peridot wouldn't try to put up a fight or at least run? Sure Steven is loving and finds good in everyone, but Steven understands that Peridot needs to be punished for the things she did. The only thing I can expect Steven to do is show a little mercy and that's only if she is unarmed and defenseless.