Shaykh Rabee said, “There is Bidah Mukaffirah (innovation which is equal to disbelief), such as rejecting the Ruyah (denying that the believers will see Allaah in the afterlife); rejecting Allaah’s Uluww (denying that Allaah is above his creation); calling on other than Allaah; offering slaughtered sacrifice (i.e. animals) to other than Allaah etc. These are [some] affairs of Bidah Al-Mukaffirah.
But we do not make takfeer (declare as disbelievers) the people who commit this type of bidah (innovation) until we establish the proofs against them. That is because some of them (the people who fall into these affairs) carry doubts and are far away from the era of prophethood and its light (i.e. guidance).
So they fall into the likes these innovations. Rejecting the Ruyah which is disbelief; rejecting Allaah’s Uluww which is disbelief; the saying that the Quran is created which is major disbelief. But this person, [who testifies that none has the right to be worshipped except Allaah and that Muhammad is the messenger of Allaah, prays his 5 daily prayers, observes fasting in the month of Ramadan, wants paradise and believes in that] received the doubts of the people of falsehood, so he falls into the likes of these affairs [these innovations that are equal to disbelief].
So we say to him: You have fallen into disbelief and the evidence is this and this and we clarify for him.
Thus if Allaah grants him tawfeeq (guidance) and he returns to the truth, then all praise is due to Allaah. But if not, we declare him a disbeliever after establishing the proofs against him.
As for Bidah Al-Mufassiqah (innovation which is less than disbelief but as it’s an innovation it is worst than a normal major sin) it is other than this [like celebrating the prophets birthday (Mawlid) or kissing the Quran after reciting it for example].”
Ref: Abridged and paraphrased from rabee.net/ar
Posted by Abdul Kareem Ibn Ozzie