Dear Welcome to HCM We understand your concerns I went through your details. I suggest you not to worry much. The description you gave here is not enough to come to a correct diagnosis. From the description, it can be understood that your father has paranoid personality and aggressiveness. We need to know why this happened? Do he drink liquor? How is his relation with other family members? What is his job? Any substance abuse? I shall advice you to take him to a psychologist who can help you. Or Please post a direct question to me in this website. Make sure that you include every minute details possible. I shall prescribe some psychotherapy techniques which should help you cure your fathers condition further. Hope this answers your query. Available for further clarifications. Good luck.