What is the status of warning against religious innovations (bid'ah) and their people in the religion?

Question:
He says: Honorable Shaykh, may Allah grant you success, what is the status of speaking about religious innovations (bid'ah) and their people, and warning against them, in the religion? I read that Imam Ahmad said that this is better than voluntary fasting and standing in night prayer.

Answer:
This is good, but the issue lies with the scholar who knows the Sunnah from the bid'ah and knows. If he is among the established scholars of knowledge who knows the Sunnah and knows the bid'ah, then there is no doubt that denouncing the bid'ah is among the greatest jihad in the path of Allah. But if he is among those who think they know or among the beginners, he does not enter into this field; he may consider something to be a bid'ah when it is not, due to his ignorance. Yes.