Shaykh Al-Fawzaan said, “Allah has not commissioned you [laymen and beginning student of knowledge with] making tabdee on people (declaring others as innovators) and to pass judgement on them to be innovators. Allah has not commissioned you with this.
Seek knowledge for now and once you have gained knowledge you will know what innovation and who the innovator is.
As for unleashing your tongues on everyone who disagrees with you, or who has done something which you criticize him for and calling him an innovator, then the sin of this will return to yourselves. The sin of this will return to yourselves!
It is a duty upon a person to withhold his tongue from these matters and seek knowledge. He should preoccupy himself with seeking knowledge.
Allah has not commissioned him to scrutinize the people and to say: This one is an innovator, that one is a faasiq (open sinner), this one has this and that one has this.
It might be that he himself has worse mistakes than the [people he has] criticized! It is upon us to fear Allah within ourselves.”
Posted by Abdul Kareem Ibn Ozzie