He should sue for religious discrimination and harassment in the workplace.
Put these freaks on notice.
tort law: an overview
Torts are civil wrongs recognized by law as grounds for a lawsuit. These wrongs result in an injury or harm constituting the basis for a claim by the injured party. While some torts are also crimes punishable with imprisonment, the primary aim of tort law is to provide relief for the damages incurred and deter others from committing the same harms. The injured person may sue for an injunction to prevent the continuation of the tortious conduct or for monetary damages.(See Damages)
Among the types of damages the injured party may recover are: loss of earnings capacity, pain and suffering, and reasonable medical expenses. They include both present and future expected losses.
http://www.law.cornell.edu/wex/tort