In the literature of Fatimid Egypt

At a time when we see some literature stating that the Fatimids established their state on an Islamic religious basis, and that the Fatimid caliphs took their lineage from their lineage to the Holy Prophet, may God bless him and grant him peace, and that the Fatimids celebrated Islamic religious holidays in a way that had not been seen before, and that they established mosques to hold prayers, and they would go out to lead them. People and sermons on holidays, and other manifestations that make it feel that the Fatimids were among the people most keen on Islam and the traditions of Muslims. At the same time, we also see these books stating that the Fatimids used to say that what God Almighty had forbidden was permissible and permissible, and they rejected prayer, fasting, and Hajj. They worked to propose religions, condemned reincarnation, dissolution, and disappearance, and claimed knowledge of the unseen...etc.
We read all of that, and we were greatly astonished at this contradiction into which the ancients and the moderns fell. The author was keen to refer to the books of the Fatimids' mission, and you are astonished that Cairo, which the Fatimids established and was the base of their vast rule, does not preserve a single book of the mission's books, so the author sought to research it. He did not insist, and the pursuit was arduous and difficult and cost him a lot of effort and money, out of a desire to reach the truth