Ruptures appeared in what had been a unified front among national Catholic leaders.
A priest was found to have violated a condition of his reassignment by continuing to work with youth.
The bishops said the proposals could harm public safety and separate families.
The Archdiocese of Chicago is seeking the canonization of the Rev. Augustine Tolton, the first U.S. priest of African descent.
Initial reports blame the attacks on members of the Muslim Fulani tribe against the Christian Berom tribe.
The agency cited women employed in private homes as in need of protection from abuse and exploitation.