Shaykh Muqbil bin Haadi al-Waadi'ee (may Allah have mercy upon him) said:
By which scale do you weigh (i.e. judge) the people if you are ignorant of beneficial knowledge? Do you weigh (i.e.judge) them based on desires or (do you judge them based on) what so-and-so Shaykh says to you? Thus, if Shaykh so-and-so retracts then you retract (with him), and if he attributes something to a group, then you do so as well...
Translator's Notes: The speech of Shaykh Muqbil رحمه الله describes so well what we are witnessing today from salafis who claim to be following evidences, but when you ask them what that evidence is all you hear from them is: "Shaykh so-and-so said." This is due to being cultivated upon blind following and being deceived to think that this is accepting the report of the trustworthy scholar.
They are only deceived due to their ignorance of the religion, and if they would have studied for themselves they would have known that this principle of accepting the report of the trustworthy narrator does not apply when there is a differing between two trustworthy scholars in the issue of jarh and ta'deel. Rather, it is incumbent to search for the truth in that situation and not be biased towards a particular scholar over another.
Unfortunately, many salafis today are being deceived and taken advantage of by the very people who they may have learned salafiyyah from and they just cannot fathom that they would deceive them in such a manner. So, you see them rushing to their defence against any and every criticism against them. Many of them rushing to the defence of personalities or organizations that they do not even know personally.
The key is knowledge. Without knowledge you will judge people based on desires and/or bias and not based on evidence. Evidence that would clarify for you where the truth is, instead of repeating,
"Shaykh so-and-so said so."
"Da'ee/student so-and-so said.
May Allaah give us understanding of the deen. Aameen.