Adolescence
Im completely sick of watching people say that Katie bullied Jamie, calling him out on his misogynistic behavior isn’t bullying. Jamie even said that other guys from the school physically bullied him, spitting on his face and stuff, and he didn’t kill them, did he? Also, he had NO reason for having a knife on him during what happened.
You can acknowledge WHY Jamie was like this and how he was influenced, but his actions will NEVER be justified.