VATICAN CITY — English Archbishop Arthur Roche is a key figure in what is offhandedly known as the Catholic Church's "liturgy wars." Pope Francis named the 71-year-old archbishop prefect of the Congregation for Divine Worship and the Sacraments in May, and two months later the pope promulgated an apostolic letter "Traditionis Custodes" (Guardians of the Tradition), limiting celebrations of the Mass according to the rite used before the Second Vatican Council. In December, Archbishop Roche released a document responding to some questions raised about "Traditionis Custodes," putting himself in the crosshairs of some of the more devoted, or belligerent, soldiers in those "liturgy wars." While the Church's prayer should not be a battlefield, Archbishop Roche told Catholic News Service it…