What was the religion of the Arabian peninsula?

Answer 1

A:

There was no real unity in the earliest form of religion in the Arabian peninsula, but many gods, of whom Al-Lah, the high God - was worshipped by all Arabs. Popular goddesses included Manat, al-Lat and al-Uzzah. By the time of the prophet Muhammad, both Christianity and Judaism had also made significant advances among the Arab people. The various pagan beliefs and the local Christians and Jews were unified in veneration of the Kabah in Mecca, which was the most important centre of worship in Arabia. Officially, the shrine was dedicated to Hubal, a Nabatean deity, and there were 360 idols arranged around the Kabah, but by the time of Muhammad, it seems the Kabah was venerated as the shrine of Allah.

Answer 2

Buddhism was then main religion of Afghanistan a long time ago, not sure if it spread to Arabia.