I just came out to my parents and they threatened to disown me if I don’t change.

So recently I came out to my parents as fiction kin (I am Tyler Durden from fight club) and when I told them that they just looked at me as if I was joking, but when I told them I was telling the truth they were yelling, screaming, threatening to leave me. I was scared. How do I explain to them that this is real and not made up?