Ruling on Attending the Sermons and Admonitions of One Who Practices the Innovation of the Mawlid

Regarding the preachers and admonishers who have such innovations and the like, is it permissible to listen to their admonitions, especially if they are good and contain no harm or encourage people to good admonition?
Praise be to Allah! The truth is not limited to their admonitions, nor to their sermons. If your going to their admonitions and sermons causes people to be deceived by them because you went, then do not go. The good they have is found elsewhere. However, if you go in order to refute their error, that is better.