Answer:
Religion in pre-Islamic Arabia was a mix of polytheism, Christianity, Judaism, and Iranian religions. Arab polytheism, the dominant belief system, was based on the belief in deities and other supernatural beings such as djinn. Gods and goddesses were worshipped at local shrines, such as the Kaaba in Mecca.
The Abbasids distinguished themselves from the Umayyads by attacking their moral character and administration. In particular, they appealed to non-Arab Muslims, known as mawali, who remained outside the kinship-based society of the Arabs and were perceived as a lower class within the Umayyad empire.
https://www.worldhistory.org/Rashidun_Government/
