[1][2] Schoppe obtained the favour of Pope Clement VIII, and distinguished himself by the virulence of his writings against the Protestants.

He became involved in a controversy with Joseph Justus Scaliger, formerly his intimate friend, and others; wrote Ecclesiasticus auctoritati Jacobi regis oppositus (1611), an attack upon James I of England; and in Classicum belli sacri (1619) urged the Catholic princes to wage war upon the Protestants.

According to Pierre Bayle, he was almost killed by some Englishmen at Madrid in 1614, and again fearing for his life he left Germany for Italy in 1617, afterwards taking part in an attack upon the Jesuits.

[1] In his Life of Sir Henry Wotton Izaak Walton, calling him Jasper Scioppius, refers to Schoppe as "a man of a restless spirit and a malicious pen.

See also C. Nisard, Les Gladiateurs de la république des lettres (Paris.