Approaching the Deviant Sects and Schools of Thought

Question:
The questioner says: Honorable Shaykh, is it among the principles of the people of the Sunnah to approach the different sects and schools of thought under the pretext of making things easy, bringing people closer together, and seeking benefits? I ask for clarification, especially since some contemporary preachers call for this and act upon it.

Answer:
Approaching them is not permissible except upon the truth and upon the methodology of the people of the Sunnah and the community. As for one who opposes this, there is no approaching him except in worldly matters, such as buying and selling and the like. There is nothing wrong with hiring him. However, approaching him when he opposes us in creed is not permissible. If the disagreement is in the secondary matters that are subject to independent legal reasoning and consideration, there is nothing wrong with it. But if the disagreement is in creed, there is no approaching between us and them. However, this does not prevent us from dealing with them in what Allah the Exalted has made permissible. Yes.