The Portuguese raid on Seville took place in late 1225, when a Portuguese military contingent inflicted a bruising defeat on the Almohad forces and then proceeded to pillage the outskirts of Seville and massacre its population.
This raid, among many other Christian incursions into Almohad territory, had started to worry the Andalusi population, who now saw the Almohads as incompetent and unable to defend their territory. This particular quote by Al-Shaqundi, although talking specifically about this Portuguese raid, clearly demonstrates fear and vunerability of the Muslims to the Christians:
Because of this and other internal problems, a wave of popular revolts in Al-Andalus ensued and the local population quickly deposed their Almohad governors. Local strongmen would take over and rule in their place.