The attitude of the Salaf towards the adherents of innovations

Ibn Batta said:

I have seen people who curse the innovators and scold them in their meetings, expressing reproof and refutation to them. however, they did not stop communicating with them, and intrigues are invisible and kufr is transparent, and as a result, these people joined them!”
“al-Ibana” 3/470

Imam Fudayl Ibn Iyad said:

“ Who helped the adherent of innovations – he helped to destroy Islam ”
“Hiljatul Avliya”, 11775

‘Abdullah as-Sarakhsi said:

“Once I ate with an innovator, and when it came to Ibn al-Mubarak, he did not speak to me for thirty days because of this!”
See al-Lalaqai 274.

Imam al-Barbahari said:

“If any of the innovations of any person becomes obvious to you, then beware of him, for verily, more of his innovations are hidden from you than you noticed!”
“Sharkhu-Ssunna” 97.

Muhammad ibn Suleiman said:

“ And I am convinced of the obligatory boycott of the adherents of innovations until they repent, and I impose a ruling on them according to their external state, leaving them hidden to Allah” “Ad-Durar as- Saniya
”, 1/33

Imam Abu Usman as-Sabuni ash Shafi’i (373-455 AH) said:

“The adherents of the Sunnah shun the adherents of innovations and delusions, and they are at enmity with the adherents of passions and ignorance, and they hate the innovators who brought into the religion that which is not from it, and do not love them, and do not make friends with them, and do not listen to their words, and do not sit with them, and do not argue with them in religion, and do not dispute with them, and protect their ears from hearing their lies.

And they are unanimous in suppressing the ahlul bidah, and humiliating them, and disgracing them, and turning them away, and moving them away, and moving away from them, and from sitting with them, and communicating with them. And the Ahlu Sunnah approach Allah, Holy and Great, by boycotting the innovators and sidelining them
.

Sufian As-Thawri (may Allah have mercy on him) said:

“He who has heard heresy should not tell it to his interlocutors and plant it in their hearts!”
”Sharh Sunnah” by Al-Baghawi. 1/227.

Shaykhul-Islam Ibn Taymiyyah said:

“You will not find among those who have fallen into innovation such that he does not have a lack of knowledge of the Sunnah and in following it. For whoever knows it and follows it has no motive for inclining to innovate. And verily, only those who are ignorant of the Sunnah fall into innovation.”
. “Sharh hadith La yazni al-zani” p. 35.