In The Name of Allaah, The Most Merciful, The Bestower of Mercy.
Shaikh Rabee [may Allaah preserve him] responded to this above doubt, saying:
Indeed, refuting the people of error and bidah and defending the Sunnah is a praiseworthy affair, and it is legislated in the Islamic Sharee’ah. And with regards to this affair, the Imaams of Islaam undertook (the task of) criticising the people of error, the people of desires and the narrators of (hadeeth), and the Islamic books (i.e. the books of the scholars) are filled with that. Books of Jarh Wat-Tadeel (i.e. the science of disparagement and appraisal) were authored in general; specific ones were written regarding the trustworthy narrators and specific ones regarding disparagement, as a fulfilment of the obligation of enjoining good and forbidding evil by the scholars and sincere advice to the Muslims, and a means of preserving the Islamic Religion. And indeed there a people – from the soofees and other than them- who are fed up with this great methodology- past and at present- so they (falsely) fling a number of shubuhaat (i.e. statements that resemble some truth but are falsehood in reality) and it has been spread to many people…[Source: An Excerpt from Juhoodul Allaamah Rabee Al-Madkhali Fee Naqdi Shubuhaatil Hizbiyyeen’ page 73.paraphrsed]