Responses

Stockholm Syndrome IS common knowledge, I've never been taught in school about it either but people mostly just hear and learn of it once they're a ceirtain age. If you don't know about it you're probably just too young, but the MC isn't a kid, he's in college and probably around 20 so yes it's normal and dare I say even expected of him to know about Stockholm Syndrome (I'm sorry if I sound rude, didn't want to offend anyone, just wanted to state my opinion even if nobody asked:))
They never taught us about Stockholm Syndrome at school. Then how the freak a kid knows that. Like did he study that for this situation lol.