No.  While some individuals and groups choose to follow Jedi as a religion, referred to as Jediism, the Jedi Realist path does not require this.  Instead we view the Jedi path as an active life philosophy.  If your interested in more about the distinction there are discussions on the discussion forum to help you.  Individuals following the Jedi Realist path may follow any spiritual path they choose so long as the values of that path are in agreement with the Jedi path.