Is it permissible to rule by tribal laws in matters of murder, theft, and kidnapping in countries that do not operate by the Sharia of Allah, knowing that the work of the reform sheikhs prevents strife and solves problems?

The rule of tribes, if not based on Sharia, is a custom of the pre-Islamic era (Jahiliyyah) and it is impermissible to rule by it. Sheikh Muhammad bin Ibrahim Al Ash-Sheikh said that elevating man-made laws to the level of what the Trustworthy Spirit (Jibreel) revealed is major disbelief (kufr akbar). Ruling by other than what Allah has revealed is injustice, oppression, misguidance, disbelief, and wickedness, citing the verses from Surat Al-Ma'idah: "And whoever does not judge by what Allah has revealed – then it is those who are the disbelievers," and "the wrongdoers," and "the defiantly disobedient." This may be a disbelief in belief that expels one from the religion, or a disbelief in action that does not expel one from it. He pointed out that tribal and clan leaders who rule by the customs of their fathers and grandfathers ("saloomehum") turn away from Allah's judgment. Sheikh Ibn Baz said: It is not permissible to revive the laws and customs of tribes that they resort to for judgment instead of Sharia; rather, they must be buried and disregarded, and one must suffice with seeking judgment from Allah's Sharia.