Bringing into the fold means to persuade someone to become a member or supporter of a group or organization. However, in the context of opposition, antonyms for this phrase may include excluding, ostracizing, alienating and boycotting. These actions indicate a deliberate attempt to keep someone out of a group or organization. Additionally, rejecting, ignoring, shunning and repelling are also antonyms for bringing into the fold. These words convey an unwillingness to accept somebody into a group or community for one reason or the other. In conclusion, bringing into the fold is a positive phrase that is antonymous with negative phrases like excluding, repelling, ostracizing, and rejecting.