There is no Jewish passport in this world. There never was. So if someone is telling you to live by your passport it is like telling you to look at the color of your hair. It doesn't mean anything. It doesn't mean you are a believer, it doesn't mean that your mother is Jewish, or your father or even a single one of your ancestors, because you could be a convert. People could argue, there is an Israeli passport but even that doesn't mean you are Jewish. You could be Arab. It's the history, stupid! Your passport won't tell you who you are. There is no such thing as a Jewish passport!