Fitna of a Wicked Scholar and an Ignorant Worshipper
Imaam Sufyaan Ath-Thawri (rahimahullaah) said: I seek Allah’s Refuge from the fitna of the ignorant worshipper and the fitna of the wicked scholar, for indeed their fitna is the trial of everyone who is put to trial. 
Imaam Ibnul Qayyim (rahimahullaah) said: Indeed the people follow their scholars and righteous worshippers, so if the scholars are wicked and the worshippers are ignorant, then the calamity through them will be widespread and the fitna will (have a) great (effect) on individuals and the general masses.
(1) Akhlaaq Al-Ulamaa’ by Imaam Al’Aajuriy’ pg 63
(2)Miftaah Daar As-Sa’aadah’ by Imaam Ibnul Qayyim’ 1/160