Chaplain: a member of the clergy attached to a private chapel, institution, ship, branch of the armed forces, etc.

By definition, a Chaplain is a religious insurgent.

Insurgent: a rebel or revolutionary.

So, an Insurgent Chaplain: An individual who is a Champlain in a country founded on the concept of separation of Church and State, but insists on being a paid state official to enforce their religion on members of the state.