I'm going to agree with Seasoned here. It's easy to reply with "move away" or "yell back" or "get the f out." But I don't think thats the best move.
When I came out to my parents, my dad flipped out. I was sitting at the kitchen table and he screamed, through his finger in my face telling me I was 1) Going to go to hell. 2) Die of AIDS. 3) Be disowned by my family. 4) Suffer from this mental condition for the rest of my life. 5) Made a terrible choice. 6) I would die alone. 7) The only people at my funeral will be my three sisters and that's because they'd be obligated to be there. 8) I would lose all financial backing from my parents.... even though I was living on my own and wasn't relying on them for financial support.
It was the worst moment and I ever had with my father, but the best moment I ever had for myself.
But there's something that you need to realize: The twisted part is, your parents want what is best for you. They love you. What they don't understand is that you ARE doing what is best for you.
They are uneducated. They have an archaic mindset about homosexuality. You have to remember that our parents were graduating high school and entering the real world when Homosexuality was still considered a disease by the medical community. Everything they learned growing up was that homosexuality and have homosexual relationships was a crime. Then, when they REALLY started paying attention to the world after high school, the AIDS epidemic hit.... and it was all because of "the gay." It really shaped their entire mindset, their entire reference point and world view of homosexuality was this terrible, dark place.
We're the product of that mindset. It sucks, it really really does.... but they are scared for you. They want to "fix you" because they still think it's something that's "fixable" and "wrong."
I've found that screaming back at my father when he has his little outbursts only perpetuates the "crazy" side of my horrible disease - do I know he's the crazy one? Yes. Do I think he will completely change some day? I'm cautiously optimistic.
The other thing I'll advise against right now is jumping ship. Your parents are acting on what they've been told. If you run off and never talk to them again, you're only going to instill this lifelong teaching that gay men aren't family-centric, that you loved your family until you "became" gay and that's when you ran away. Actions speak louder than words. The absolute hardest thing I had to do after coming out to my father was to see him the weekend after I came out. I made a conscious decision to do everything in my power to defy his thought process that I would be disassociated from my family. I did that because my family was important to me, and if my father changed his viewpoint in the process, great. If he didn't, that would be his problem, and not mine.
I know it's crazy to hear this, and it's hard to believe but your parents are doing what they THINK is best for you. They're doing it out of love. They're just uneducated and unfamiliar with how normal homosexuality is. They may only be familiar with gay=drag queens and glitter. By showing them you're normal, and you're doing normal things with your life, and GOOD things with your life, their opinions may change... it could take a month, it could take a year. They're acting how they are because they love you and they want whats best for you. Return the favor and continue to talk to them, continue to show them (with action, not so much words), that you're a normal person, contributing to the world and society, and that you're going to be OK. Do that out of love for them, and because you want what is best for them.
Feel free to PM if you need to. We're all here for you.