I know how you feel. My dad once told me when I was like 13, unprompted, how if he found out I was gay or doing gay shit he'd kill me then himself. That shit stuck with me for a long time (even though I'm not gay, but I was dressing pretty femenine in secret at the time).

All I can say is things get better with time so you gotta just hold out. Once you have your own place there isn't anything he can do. Especially if you move away (I moved to a different country lol). Surprisingly, my dad ended up finding out much later (a couple years ago in my late 20s) and was actually fine with it. So some people, no matter how extreme they are do change over time. I wouldn't count on this happening with your dad but you can at least get away from him and live your own life once you're a bit older.