Complex sentence: In many such cases the state separated them from their families, of which the Edgardo Mortara account is one of the most widely publicized instances of acrimony between Catholics and Jews in the Papal States in the second half of the 19th century.
Split into simpler sentences: In many such cases the state separated them from their families. See Edgardo Mortara for an account of one of the most widely publicized instances of acrimony between Catholics and Jews in the Papal States in the second half of the 19th century.