You is a whole red flag, if someone forcefully touches you without permission you have every right to push or defend yourself, if you feel threatened you have every right to defend yourself.
kissing someone without their consent can be classified as sexual assault. If you feel threatened by someone's words or actions wether it's direct or indicated that's assault. Jiwook has every right to push or slap him because he's been assaulted TWICE by the same guy you're trying to defend. Not only are you trying to defend the assaulted you are forgetting he's a rapist, abuser, stalker and gaslighter.
if you have friends who experiences anything Jiwook is going through I hope you keep you silly a** mouth shut. And if you do open your mouth I hope they realize how twisted your view point is and never take your advice when it comes to stuff like this.