Shaykh Bin Baz said, “It is well known from the statements of the people of knowledge that they criticise the bad points in order to warn (others), and also they explain the errors in which they (those who erred) fell into, again for the purpose of warning against them.
As for what is good in them, then that is known (from them already), and such good is accepted.
However, the purpose is to warn from their errors, (such as) the Jahmiyyah, the Mu’tazilah, the Raafidah and what is similar to them.
But, if the need should arise to explain what they have of the truth, then it is explained.
If someone asks, ‘What do have with them of the truth? In what matters do they agree with Ahlu Sunnah?’, and the one who is asked knows this, then he makes it clear.
However, the greatest goal is to explain the falsehood that is with them, so that the questioner can take caution and so that he does not incline towards them.”
Also the shaykh said, “No, it is not necessary, it is not necessary (when you criticise an innovator to mention his good points).
This is why when you read the books of Ahlu Sunnah you will find the purpose behind them to warn.
Read in the book of al-Bukhaaree ‘Khalq Af’aal ul-‘Ibaad’ and ‘Kitaab ul-Adab’ (the Book of Manners) in the Saheeh and ‘Kitaab us-Sunnah of Abdullaah bin Ahmad and ‘Kitaab ut- Tawheed’ of Ibn Khuzaimah and the refutation of Uthmaan bin Sa’eed ad-Daarimee against the Ahl ul-Bid’ah… and other such books. They mention this for the purpose of warning from their falsehood and the intent is not to enumerate their good points.
The intent is to warn from their falsehood. And their good points have no value in relation to one who disbelieves – when his innovation makes him a disbeliever, his good deeds are nullified and when it does not make him a disbeliever then he is in a precarious situation. The intent is to expose the errors and deviations – which it is necessary to warn against.”
Ref: Manhaj Ahlu Sunnah wal-Jamaah Fee Naqd ir-Rijaal wal-Kutub wat-Tawaa’if” of Shaykh Rabee’ bin Haadee
Posted by Abdul Kareem Ibn Ozzie