Ruling of Teaching or Giving Da’wah in the Mosques of the People of Innovation

Giving daʿwah in the mosques of the people of Sunnah, this is what is required. However, if he goes to those (people of Bid’a) and gives them a speech, clarifying the Sunnah and the dangers of Bid’a (innovation within religion), then this is good. As long as he will be able to speak about clarifying the Sunnah. However, if he talks about that which they desire and want, then he must not go.