 In response, the Wahhabis considered Ibn Fayruz an idolater (mushrik) and one of their worst enemies.According to the historian Ibn Humayd, Ibn 'Abd al-Wahhab's father criticized his son for his unwillingness to specialize in jurisprudence and disagreed with his doctrine and declared that he would be the cause of wickedness.Similarly his brother, Suleyman ibn 'Abd al-Wahhab wrote one of the first treatises' refuting Wahhabi doctrine claiming he was ill-educated and intolerant and classing Ibn ʿAbd al-Wahhab's views as fringe and fanatical.