Try telling it to William Tyndale...or Thomas More, even.
William Tyndale was arrested at the request of the Protestant King of England by an emperor Charles who was Catholic but eager to retain good relations with the Protestant king and was bound by the treaty of Cambrai; hence, Tyndale cried for the conversion of the King of England, not for the Emperor of Germany.
Thomas More? Really? The Thomas More who was tried for insurrection for being tied to Elizabeth Barton, but produced a letter instructing her NOT to muddle religion and state? The Thomas More who happily acknowledged Queen Anne Bolyn as rightful queen, but was hanged because he would not recognize the King’s authority over the church? The Thomas More who refused, on pain of death, to reveal his personal, religious objections to the King’s marriage for fear that it might violate the Statute of Praemunire? If ever there were a case study of a Catholic refusing to mix religion and state, it was Thomas More.