No idea what happened there. It seems to be taking comments now.
1. Oddly enough they do seem to have an archery tradition in the biblical and classical period, Arab city states deploy archers in the Roman period, later Arab troops serve in Sassanian and Byzantine armies both of whom have a prominent archery component. In our period Kennedy gives examples of Arab horse archers. Consider the three visits to the Chinese. On the third visit the Arabs appear mailed and with their bows on their shoulders.
2. Steppe archers excel and Turk tactics brought something powerful and new. So, the Turks replace the Arabs as the dominant military caste of Islam. What puzzles me is when the bow disappears from the Arab cavalry. We are even told that that the Bedouin despise the taking of life with a bow. Something had changed and when currently eludes me.