Is it permissible for Du`ah (callers to Islam) to practice Da`wah (calling to Islam) in a place where Bid`ahs (innovations in religion) used to be practiced, such as the places of celebrating the Mawlid (the Prophet's birthday)?
Is it permissible to propagate virtue and prevent vice there?
Celebrating the Mawlid is a rejected Bid`ah. However, there is no objection to using the place where the Mawlid used to be celebrated for the propagation of virtue and Da`wah.May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family and Companions.