Archeology shows a continuity in the Maghreb before the Arab conquests and after it, and the reports that describe the conquest like that were written centuries after the fact at a time when the Umayyads of Iberia were enemies to the Abbasid-aligned Aghlabids, with much of them coming to us through second hand sources like Ibn Khaldun who wrote in the 13th century and had no way to verify the information found in his sources