Establish a national church led by your head of state and call this individual “Defender of the Faith”: to some contemporary ears this might sound like a recipe for a coercive, farright form of Christian nationalism.
When King Charles III was crowned in Westminster Abbey on May 6, 2023, in the first explicitly Christian coronation held anywhere in the world in seven decades, he was hailed as Supreme Governor of the Church of England and Defender of the Faith—the latter being the English translation of the centuries-old Latin formulation Fidei Defensor.