Interfaith marriage in Judaism was historically looked upon with very strong disfavour by Jewish leaders, and it remains a controversial issue among them today. [..] In the early 19th century, in some less modernised regions of the world, exogamy was extremely rare—less than 0.1% of the Jews of Algeria, for example, practiced exogamy. In the early 20th century, even in most Germanic regions of central Europe there were still only a mere 5% of Jews marrying non-Jews.
To underscore how very disfavored mixed marriages were, Bernard S. Bachrach's Early Medieval Jewish Policy in Western Europe states (speaking about the 6th century, but it is unclear how wide-ranging this policy was):
According to Jewish custom a woman who willingly and openly went to live with a non-Jew was considered dead by her family and by the Jewish community. Legally it was the duty of the community to stone her to death if she could be found.
Interfaith marriage in Judaism was historically looked upon with very strong disfavour by Jewish leaders, and it remains a controversial issue among them today. [..] In the early 19th century, in some less modernised regions of the world, exogamy was extremely rare—less than 0.1% of the Jews of Algeria, for example, practiced exogamy. In the early 20th century, even in most Germanic regions of central Europe there were still only a mere 5% of Jews marrying non-Jews.
To underscore how very disfavored mixed marriages were, Bernard S. Bachrach's Early Medieval Jewish Policy in Western Europe states (speaking about the 6th century, but it is unclear how wide-ranging this policy was):
According to Jewish custom a woman who willingly and openly went to live with a non-Jew was considered dead by her family and by the Jewish community. Legally it was the duty of the community to stone her to death if she could be found.