Thrown out of Judaism? – Ask the Rabbi
Q. Can anyone be thrown out of Judaism?

You are a Jew because of who you are, which is basically an ethnic matter, a matter of peoplehood. Judaism is a religious culture but Jewish culture is inseparable from Jewish peoplehood. Judaism is the religion of the Jewish people.
A Jew who is disloyal is still a Jew. A Jew who does not live as a Jew is still Jewish. The rabbis of Amsterdam tried to punish Spinoza for wrong ideas but they couldn’t prevent him remaining a Jew.
The answer to your question is “No”.

