One of the first actions to take is to report the instance to a local and/or federal law enforcement agency. Since many anti-religious extremists are currently under investigation by various law enforcement agencies, your report may aid law enforcement in their efforts to deal with them appropriately.Also, it may be best to make such complaints/reports in coordination with your Church as a hate crime is often specifically committed to harm and terrify not only a particular victim, but the entire group of which the victim is a member.