Then show us the proofBanu Qahtaan were the first tribes of Mogadishu. This is well documented. You just don't have the intellectual capacity to analyze historical sources with a critical eye. Read all those sources. You are running around in circles like a lunatic.
The ancestors of the old Arab tribes had migrated from as early as the 2nd Hijri century to the 7th Hijri century.
Xamar comes from the word Himyar. Arabs controlled the coastal region of Azania, which stretched from Mogadishu all the way to Rhapta. Azania included Mogadishu, Marka, and Barawa and was subject to Amir Sharahbil Ya’fir ibn As’ad Abu Karib. Amir Sharahbil was the king of Yemen and ruled between 418 and 433. Himyar inscriptions were discovered in Xamar. Various waves of Arab migration took place from the antiquity period until the spread of Islam along the Indian Ocean trade. You are coping after being intellectually humailted.