In The Name of Allaah, The Most Merciful, The Bestower of Mercy.
Imaam Fudayl Ibn Iyaad [rahimahullaah] said, ‘’Had the innovator humbled himself to the Book of Allaah and the Sunnah of His Prophet, he would not have followed his innovation; but he is amazed with his views, so he follows what he invented’’. [Ref 1]
Imaam Fudayl Ibn Iyaad [rahimahullaah] said, ‘’Whoever frightens an innovator away, Allaah will grant him safety on the Day of Great Terror’’. Shaikh Saaleh Al-Fawzaan [hafidhahullaah] commented saying: ‘’Whoever frightens him by way of speech and [shows] him rejection, then Allah will reward him on the day of judgment- with a good reward on the day of Great Terror, because he rejected an evil deed; but if he commends and praises him, this is from hypocrisy and [tantamount to having] loyalty to the enemies of Allah. [Ref 2]
[Ref 1: AdhTadzkirah Fil Wadh: page:97]
[Ref 2: It-haaful Qaaree. Vol 2 pages 322-326. Slightly paraphrased]