Advice for callers regarding the harm inflicted upon them by takfir (declaring someone a disbeliever) practitioners and how to warn against them

Question:
Honorable Shaykh, may Allah grant you success. He says: In some Muslim countries, Salafi callers are subjected to harm by those who follow deviant methodologies, particularly by the takfir (declaring someone a disbeliever) practitioners. In fact, some Salafi callers have even been assassinated by these people because of warning against their methodology and exposing their falsehood. His question is: Do you advise against openly addressing what these takfir (declaring someone a disbeliever) practitioners are upon, and against mentioning them specifically? What is the advice in this matter?

Answer:
And begin matters gradually, not by confrontation or harshness, but rather with gentleness, softness, and attraction, step by step. Yes. Do not forget this verse: . This is the methodology of da'wah (calling others to Islam). But who are the ones who understand it and comprehend it? Do they want all matters to be fixed at once, or do they leave them all? This does not work; matters are addressed step by step.