What is the ruling of Islamic law regarding the refusal of the tribesmen of the questioner’s sister to her marriage to a man from outside the tribe, their assault on his house, and their adherence to tribal customary law instead of Islamic Sharia, despite the completion of the marriage contract and the consent of the family and the girl? And is it necessary to annul this marriage to prevent harm, out of concern for the feelings of the tribesmen?

If a girl consents and marries a righteous man with her guardian's approval, then no one has the right to object. The tribe's interference to divorce the girl resembles the actions of the devil and sorcerers in separating spouses, and it is considered an injustice to the husband and the guardian, and an act of disobedience to Allah. The default rule for divorce is prohibition, and it is not permissible to divorce the girl because of the tribe's objection; rather, the marriage should continue. If the guardian fears harm, he should seek assistance from people of righteousness or from the authorities to avert the harm.