Bonfed was present at the controversy of Tortosa (1413-14); and many of his poems are addressed to those who took part in it.
The diwan contains also an answer, in rimed prose, to a letter of the converted Jew, Astruc Raimuch of Fraga, in which the neophyte enthusiastically propounds the dogmas of Christianity, and endeavors to demonstrate the Trinity, original sin, and redemption, from the Bible. Apologizing for discussing the contents of a letter not addressed to him, Bonfed minutely examines the Christian dogmas, and proceeds to argue how irrational and untenable they are. He says: "You twist and distort the Bible text to establish the Trinity. Had you a quaternity to prove, you would demonstrate it quite as strikingly and convincingly from the Old Testament."