Shaykh Al-Fawzaan said, “When the one who is being criticised is from Ahlu Sunnah Wal Jamaah and his mistakes are in matters which do not relate to aqeedah (Islamic beliefs), then yes… good points and exceptional [qualities] are mentioned. His mistakes and his ips are overwhelmed by his aid for the Sunnah.
But when the one being criticised is from the People of Misguidance and the People of Deviation and from the People of Destructive and Adulterated Principles, then it is not permissible for us to mention their good points – when he has good points – because when we mention them, this deceives the people and makes them hold a good opinion about this strayer or about this innovator or deviant or partisan (hizbiyy, one engrossed with party- spirit).
So then they accept the ideas of this strayer or this innovator or this biased partisan. And Allah refuted the Disbelievers, the Criminals and the Hypocrites and did not mention any of their good points.
Furthermore the Scholars of the Salaf refute the Jahmiyyah and Mu’tazilah and the People of Misguidance and they never mention any of their good points. This is because their good deeds are impaired by their misguidance, disbelief, deviation and hypocrisy.
So it is not befitting that you refute a straying wanderer, innovator and eviant and then mention his good points and that you say he is a good man, he has this and that good point, but he made a mistake! We say to you: Your praise of him is stronger than your his misguidance, because the people will hold on to you praise of him.
So when you promote this straying innovator and you praise him then you have deceived the people and this opens up the door for accepting the ideas of those who lead others astray.” Spubs.com
Posted by Abdul Kareem Ibn Ozzie