I was brought up as a Scottish-American Protestant by a single mother. It was only until my teens that my Grandmother told me her mother was originally Jewish and was forced to convert in secret by my Great Grandfather so that his largely German Christian hick farming community would accept them.

In that case intermarriage did wipe out a group of potential Jews. But it's an extreme case from a long time ago. Intermarriage today is radically different. It's about cultures coming together, without losing their unique characteristics. I hope...