10. Among these groups are those who implement the rule or false principle “We cooperate with each other in that which we agree upon and we excuse each other regarding those matters in which we differ.” Rather what is obligatory in regards to the one who differs with a matter from the Sharee’ah, is that he is advised and then afterwards if he does not accept the evidenced truth then he is boycotted and enmity is shown towards him once the proof is established against him in his clear opposition to any fundamental or principle from the fundamentals and principles of Islaam.
The above points are taken from the work:
The source was an appendix to the small work “The Methodology of the People of the Sunnah and Adherence to the Jama’ah in Calling to Allaah.” by ‘Abdullah Ibn Muhammad Ibn Saaleh al-Ma’taar (Published by Dar Ibn Jawzee, Cairo 1425)
with an introduction by the esteemed guiding scholar Sheikh Saaleh Ibn Fauzaan al-Fauzaan, may Allaah preserve him.