The Ruling on Praying Behind an Imam Who Dislikes Hearing the Call to the Oneness of Allah

Question:
Honorable Shaykh, may Allah grant you success. We have a person in our mosque who frequently goes out to call people to the faith in Pakistan and other lands of graves. When someone speaks about the oneness of Allah in our mosque, he stands up and does not sit; rather, he leaves the mosque. And when the imam is absent, he prays in his place. What is the ruling on praying behind this man? May Allah grant you success.

Answer:
The one who dislikes the warning and stands up when the warning is spoken of, it is not permissible to pray behind him, and his leaving is repeated. As for if he leaves once or twice, perhaps he has an excuse, perhaps he left for a need, so we do not hasten to rule against him. But if his leaving is repeated, this is evidence, I say, that is sufficient. By mentioning the oneness of Allah, it is not permissible for him to lead people in prayer. Yes. And it must be said to the imam: Do not let him lead people in prayer. This is your path and this is your path. Yes.