“The indigenous population would have been able to show resistance to the handful of Arabs who crossed the Straits, but Witiza had disarmed them, leveled the towers to the ground and had the lances turned into harrows.”
While the Visigoth kingdom disarmed under the influence of the Jewish advisors and friends of Witiza, dismantled its defence and destroyed its war power, the Jews encouraged the Musulmans to fall upon the Christian kingdom and to destroy it. Great preparations were made in North Africa for this.
https://www.heritage-history.com/index.php?c=read&author=pinay&book=plot2&story=betray