Sufyaan ath-Thawree, may Allah have mercy upon him, said:
It is said:
"Seek refuge with Allah from the Fitnah of the ignorant worshiper, and the Fitnah of the sinful scholar, for indeed their Fitnah is the Fitnah of every person who as been afflicted by Fitnah."
Akhlaaq al-'Ulaamaa by al-Aajuree: P.63
Ibnul Qayyim, may Allah have mercy upon him comments:
"For indeed people take their scholars and the devout worshipers amongst them as their role models, so if the scholars are sinful and the devout worshipers are ignorant, then the Fitnah would be wide spread upon every one; the common folk as well as the nobles.."