The Karate Kid/WMG

Ali is the real villain of the first movie
Okay hear me out. Yes Kreese is a huge douchebag, but he never actively encourages his students to pick on those weaker than themselves. He is only shown as being merciless when it comes to fighting, and given where he received his training, the military most likely during Vietnam, that makes sense as anyone who has learned MCMAP or Krav Maga would tell you. In his dealings with Mr. Miyagi coming to his dojo and accusing his students of picking on Danny, Mr. Miyagi has insulted his honor as their sensei, by accusing him of teaching them improperly. This would be an insult in any real dojo. However, if we look at Ali throughout the movie we notice that she really is the reason for why Danny and Johnny are fighting and at no point does she try to get them to stop. She actively hangs out/flirts with both of them, and the same guys that Johnny hangs out with and beat up Danny are also her friends and at no point is she ever shown refusing to hang out them or trying to get them to lay off of him. Instead she insists that he learn to fight that way he can beat Johnny up. This troper has come to the conclusion that Ali gets off on watching boys fight over her so she tries to facilitate this as much as possible. Johnny is hopelessly in love with her and she keeps him on an emotional leash by constantly breaking up with him, not talking to him, getting back together with him, flirting with other guys and generally making things confusing for him. Johnny just wants to be with Ali, Danny is not used to getting much attention from girls and whenever Danny does try to leave Ali alone as she keeps getting his ass kicked, she actively seeks him out in public, at school where Johnny or his friends can see, to get him beat up again because she likes to watch it.