Harb al-Karmani said: “I said to Ishaq (Ibn Rahwayh, teacher of Bukhari): A man says to a mushrik that he is a very intelligent man. Ishaq said: “One should not say anything like that to them, because they have no intelligence at all.” [Ahkam Ahl al-Dhimmah, 3/325]
قال الإمام حرب الكرماني -رحمه الله تعالى- : (( الرافضة أسوأ أثراً في الإسلام من أهل الكفر من أهل الحرب )) [ إجماع السلف ص84 ]
“The Rafidah are more harmful to Islam than the Ahl al-Harb (kuffar who wage war against the Muslims).” [Ijma’ al-Salaf, p. 84]
“I did not see any people who resemble the Christians (i.e.. in their falsehood) more than the Sabaites (Sabaiyyah, the followers of Abdullah Ibn Saba al-Yahoodi).” Ahmad Ibn Yunus comments: “They are the Rafidah.” (Kitab al-Sunnah by Imam Harb al-Karmani)
No doubt, the Salaf (may Allah have mercy upon them) spoke the truth.