I hate my brother?

seek help from a proffesional. i dont know what to say about the threats, but with the teasing just ignore him. People tease to make others embared or upset, and if you don't react they won't continue. If you could get hurt from him the police could get involved. It could just be his way of showing he loves you (by spending time with you), and he gets a good laugh. If you think you could talk to him about it (without getting injured) he might possibly understand that what he is doing is wrong. Hope this helps! Good Luck~Cheeso