Your parents are right. There is a pattern of behavior here that has physically hurt you by both biting and pulling your hair. He antagonized you by taking the car keys, upsetting you, escalating the situation by throwing the keys in the tree (which forces you to risk injury by climbing). He antagonized you further by repeatedly throwing your scarf out the window, and then provoked you further by wiping the car with it. The excuse that he was trying to calm you is simply a lie. If he was trying to calm you he was doing a horrible job and should have realized it. The fact that he can either not tell that he is making you upset, or is lying and is trying to make you upset is cause for concern.
You do not need to be with anyone that bullies, antagonize, and provokes you and then says he is doing it in the name of calming you down. Whatever his problem is, don’t let it become yours.
Your parents are right and it is time for you to have people in your life who will treat you better.