Warning from Misguidance, Innovation and Their People Is Not Completed Except by Differentiating, Classifying and Identifying the Various Groups, Naming and Labelling Them, and Describing Them with Their Respective Characteristics
The people of knowledge have explicitly mentioned that there is no objection in naming the people of division, pinpointing them and mentioning them with their characteristics in order to warn the people about their doubts, innovations and state/condition.
Shaykh Muḥammad ibn ʿUmar Bāzmūl, Sharḥ Uṣūl wa Ḍawābit fī-al-Takfīr pg. 281.
The following was said to Shaykh Muḥammad ibn ʿUmar Bāzmūl (حفظه الله): “There are those who say: ‘Have mercy upon Salafiyyah and do not be the cause of it’s division! So, [do not say] this one is Ḥaddādī and the other is this and the third is that, and so...