1) Islam first spread to Southeast Asia through Arab and Persian traders in the 9th century, but mass conversions did not begin until the 13th century with the arrival of Muslim scholars fleeing the Mongol invasion of Baghdad.
2) Local traditions from Patani in southern Thailand indicate that the initial converts to Islam were high-status individuals like rulers, who converted for political and economic reasons rather than spiritual ones. Whole populations did not immediately convert.
3) While Thai historiography claims the southern Muslim provinces were incorporated into the kingdom in the 13th century, the evidence suggests these areas had only loose tributary relationships with northern Thai kingdoms like Sukhodaya and were largely autonomous.