ABSOLUTELY YOU ARE

JEWISH

YOUR MOTHER WAS A JEWISH CONVERT . WHEN YOU WERE BORN

JUDAISM FOLLOWS THE FAITH OF THE BIRTH MOTHER. RE FAITH OF CHRILDREN

THUS YOU ARE JEWISH ACCORDING TO JUDAISIM

Yes. According to Jewish law, if your mother was Jewish, you are Jewish. Doesn't matter how she came to be Jewish.

You would also be irrevocably Jewish by Nazi law.

Of course, what really matters is what you think you are.

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SuperDave: Nazi law is quite relevant to the question, but since you choose to (rudely) answer your own question, I won't bother explaining.