I was chatting in a Yahoo room, and an evangelical woman was trying to persuade people that Christianity was the only true religion. I was rebutting her arguments.
At one point of the discusion I commented that I was a Goy and my family was Catholic.
The woman exclamed: "But then you aren't a Jew!"
I said: "Of course, I am not a Jew. What on Earth made you think I may be Jewish? Just because I disagree with your beliefs, you think I must be Jewish. I see you have a great prejudice against me, since you think you can know what I am, when I have told you nothing. And you have also a great prejudice against the Jews, because you call anybody who disagrees with you, a Jew"
The woman replied: " I have no prejudices against the Jews, I love them. I even consider myself Jewish, since I believe in Jesus, and Jesus was a Jew, wasn't he?"
I replied: "Jesus may have been a Jew, providing that his mother was. But you are not Jewish just for believing in him. I also believe in a Jew, Dr. Sabin, I have even received his vaccine.... Would you consider me a Jew for that?"