“Allaah subhanahuu, rejects those who refused Allaah’s Shareeah; the laws that are good for the Muslims; the laws that forbid what is evil. Allaah rejects those who follow laws of personal desires and who adopt laws of Kufr such as the laws enforced by the Tartars who were under the control of Gengiz Khan, their king. These laws were a mixture of Judaism, Christianity and laws chosen by their king that suited his desires. Should we prefer these laws to the Sharee`ah of Allaah and His Prophet (sallallahu alaihi wa sallam)?”
Book:Tafsir Ibnu Katsir