In The Name of Allaah, The Most Merciful, The Bestower of Mercy.
Shaikh Rabee Bin Haadee Al-Madkhalee [hafidhahullaah] said:
To be mindful of Ahlul Bidah [The people of religious innovations] – to have hatred for them and boycott them- is the correct path of protecting Ahlus Sunnah against falling into their fitnah. And to be lackadaisical about them- to harbour a good suspicion of them and inclining towards them- is the beginning of the path towards misguidance and deviation. Allaah said:
وَلَا تَرۡكَنُوٓاْ إِلَى ٱلَّذِينَ ظَلَمُواْ فَتَمَسَّكُمُ ٱلنَّارُ
And incline not toward those who do wrong, lest the fire should touch you. [Surah Hud, Aayah 113]
And who is more unjust than Ahlul Bidah? Ahlul Bidah are more evil than the sinners, and due to this the Faqeeh of Basra and the most intelligent of them- Salaam Bin Abee Mutee [rahimahullaah]- said, “It is more beloved to me that I meet Allaah with the scroll of Hajjaaj than meet Him with the scroll of Amr Ibn Ubaid”.
Amr Ibn Ubaid was a Zaahid and a worshipper Maashaa-Allaah, but he was an innovator and a misguided one, and Hajjaaj was an evil doer, a blood shedder and a criminal. He [Salaam Bin Abee Mutee] held that if he were to make a choice between meeting Allaah with the scroll of Hajjaaj and that of Amr Ibn Ubaid, he would choose to meet Allaah with the scroll of Hajjaaj-the blood shedder and oppressive evil doer. And why is this? [That is] due to his realization regarding the danger and ugliness of bidah. And it is sufficient for us that the Messenger [sallal laahu alayhi wasallam] described [bidah] in his khutbah as the worst of all affairs, as reported in the Hadeeth of Jaabir [radiyallaahu-anhu] [Ref 1]
Allaah waged a more severe war against the Jewish Rabbis, the Christian Monks and the evil scholars amongst them than He has against the Tyrannical Rulers. Why is that the case?; because the misguidance and corruption of the (Tyrannical Rulers) is well known and is clear to the people, but these (Rabbis, Monks and evil scholars) confound truth with falsehood, as Allaah said: [لِمَ تَلْبِسُونَ الْحَقَّ بِالْبَاطِلِ وَتَكْتُمُونَ الْحَقَّ وَأَنْتُمْ تَعْلَمُونَ – Why do you mix truth with falsehood and conceal the truth while you know] [3:71]
This is the condition of ahlul bidah (i.e. the people who innovate in the religion). They possess something of the truth, or they possess something of misguidance and mix it with the truth until deceitful paths are spread. Allaah is more knowledgeable about His slaves, and see how many (times/instances) the Jews and their scholars and the Christians have been censured, rebuked, cautioned and disparaged. Why is that the case?; because they corrupted the Religion of Allaah.
This is the state of affairs of the people of bidah. They have a share of this rebuke which Allaah (Tabaaraka-Wata-Aalaa) directed towards the Jews and the Christians. The proof (for this) is the saying of the Messenger (sallal-laahu-alayhi-wasallam): ”You will follow the ways of those who came before you exactly in the same fashion to the extent that if they were to enter a lizard’s hole you will (also) enter it”
Indeed the people of innovation have fallen into this evil, and they have followed the Yahood in their false interpretations, distortions and lies, and in their spreading and publicising falsehood. They have shared in all these affairs with the Yahood and Nasaaraa. So there is a strong resemblance between them and these (Jews and Christians). Indeed the Messenger (sallal-laahu-alayhi-wasallam) informed (us) that they will follow the ways of the (Jews and Christians). [Ref 2]
[Ref 1: An Excerpt from Al-Mawqif As-Saheeh Min Ahlil Bidah. page 12. Slightly paraphrased]
[Ref 2: An Excerpt ferom Al Mawqiful Saheeh Min Ahlul Bidah. Pages 22-24. Slightly paraphrased]