Many scholars have considered the above machinations of the Nadir as a reason for the battle. According to Montgomery Watt, their intriguing and use of their wealth to incite tribes against Muhammad left him no choice but to attack. Vaglieri concurs that one reason for attack was that the Jews of Khaybar were responsible for the Confederates that attacked Muslims during the Battle of the Trench. Shibli Numani also sees Khaybar's actions during the Battle of the Trench, and draws particular attention to Banu Nadir's leader Huyayy ibn Akhtab, who had gone to the Banu Qurayza during the battle to instigate them to attack Muhammad.