Al-Imām ‘Abdul-‘Azīz Ibn Bāz ( رحمه الله) was asked:
الذي يثني على أهل البدع ومدحهم هل يلحق بهم؟
“May Allah grant you goodness O Shaikh. The one who compliments Ahlul-Bid’ah and praises them, is he counted among them?”
نعم، لا شك، أن من أثنى عليهم ومدحهم هو داع لهم، يدعو لهم هذا من دعاتهم، نسأل الله العافية
“Yes. No doubt. The one who compliments them and praises them is a caller to them. He invites to them. This one is from their callers — and we ask Allah for well-being.”
Ref: Ta’līq Samāhatish-Shaikh Al-Imām Abdul-Azīz Ibn Bāz ‘alā Kitāb Fadl Al-Islām li Shaikhil-Islām Muhammad Ibn Abdil-Wahhāb (p. 29)
Allāh’s Messenger (ﷺ) said:
وَمَنْ دَعَا إِلَى ضَلاَلَةٍ كَانَ عَلَيْهِ مِنَ الإِثْمِ مِثْلُ آثَامِ مَنْ تَبِعَهُ لاَ يَنْقُصُ ذَلِكَ مِنْ آثَامِهِمْ شَيْئًا
“…and whoever invites people to misguidance shall have to carry the burden of its sin just like those who perpetrated it without their sins being diminished in any respect.”
(Muslim, no. 2674)
Al-Imām Abu Muhammad ‘Abdur-Rahmān Ibn Abī Hātim (died 327AH) said:
“I heard my father (i.e. Abu Hātim, died 227AH) and Abu Zur’ah (died 264AH) command with boycotting the people of deviation and innovation. They were both very stern in their view regarding this matter with the utmost sternness. And they would forbid writing books based upon opinions without recourse to the narrations.
They forbade sitting with the People of Theological Rhetoric (Ahlul-Kalām) and from looking into the books of Ahlul-Kalām. They would both say: ‘The person of theological rhetoric will never prosper.'”
Ref: The Creed of the Rāziyayn, p.11, Salafi Publications. 2016.