Is it obligatory to maintain kinship ties with family members who cause harm, steal, oppress, and incite oppression, out of fear for one's children's destruction because of them?

Kinship ties are obligatory to maintain, and severing them is forbidden. A maintainer of kinship ties is one who reconnects with their relatives when they have cut off ties. If maintaining kinship ties with a relative causes certain harm, then it is not obligatory to maintain them. Islamic law has not specified a particular method for maintaining kinship ties; rather, the prevailing custom is the reference point, and this varies according to ability and need. One must always show filial piety to the mother and serve her when needed, and beware of disobeying her in matters that do not contradict Islamic law.