Complex sentence: Like the other Arabs of the region, the Mirdasids were Shi'a Muslims, although as a result of the expansion of the Seljuk Turks into the area they were constrained to convert to Sunni Islam under Rashid al-Dawla Mahmud.
Split into simpler sentences: Like the other Arab tribes of the region, the Mirdasids were Shi'a Muslims. However, as a result of the expansion of the Seljuk Turks into the area they were constrained to convert to Sunni Islam under Rashid al-Dawla Mahmud.