ユダヤ教で「他宗教の子の養子縁組」は罪ですか？

Judaism's adoption tradition runs from the Bible's own stories — Moses adopted by Pharaoh's daughter (the tradition's archetypal righteous adoptive parent), Esther raised by Mordecai — to a Talmudic legal mechanism built for exactly the cross-faith case. Giyur katan — conversion of a minor — is discussed in Ketubot 11a: a court may convert a foundling or adopted non-Jewish child (immersion in the mikveh, circumcision for boys), the parents observe the commandments on the child's behalf, and — the remarkable clause — the child, upon reaching majority (twelve for a girl, thirteen for a boy), may protest (me'ah? — mi'un-like refusal) and decline the conversion, dissolving it. Modern poskim apply this directly to international and cross-faith adoptions, with practical guidance: do the conversion properly (a beit din, proper immersion — 'committee conversions' at the hospital have been criticized), tell the child their story age-appropriately (the tradition favors truthfulness), and handle the majority-confirmation question with sensitivity — some authorities counsel a symbolic affirmation at bar/bat mitzvah age. The deeper Jewish note: the parent-child bond created by love and raising is honored as real — 'whoever raises a child is called their parent' appears in rabbinic thought — while origins are kept honest.