In The Name of Allaah, The Most Merciful, The Bestower of Mercy.

Abu Sa’eed al-Khudree [may Allah be pleased with him] said, “I heard Allaah’s Messenger [peace and blessing of Allaah be upon him] say, “Whosoever of you sees an evil, let him change it with his hand; and if he is not able to do so, then (let him change it) with his tongue; and if he is not able to do so, then with his heart, and that is the weakest of faith”. [Saheeh Muslim. Hadeeth 49]

May Allaah bless our beloved Salafi brother Abu Nuaim (Abdullah) and his parents. Indeed, he fulfilled this Fardu Kifaayah by rebutting and exposing the obstinate Musaafiqah – Abu Makkah and his ilk (may Allah guide them) Aameen. Pdf here:  Prevention_of_Muslims_from_Mosques_Abu_Makkah_v1