Benedict XVI in his book "God And the World" questioned the existence of the 10 Commandments & claimed that Jews are excused for rejecting Christ. He also publicly prayed with Muslims in a mosque (who …More
Benedict XVI in his book "God And the World" questioned the existence of the 10 Commandments & claimed that Jews are excused for rejecting Christ. He also publicly prayed with Muslims in a mosque (who reject that Jesus is God) & he participated in a Jewish service in a synagogue (in which Jews prayed for the coming of a different 'Messiah') - both were public acts of apostasy.

In light of Catholic teaching, Catholics must reject Benedict XVI as a heretic. He was an antipope. Long before his election, Benedict XVI was a public heretic. He was instrumental in ushering in Vatican II, which teaches numerous heresies that have been condemned. Heretics also can't be validly elected Pope, as defined by Paul IV in the papal bull Cum Ex Apostulatus Officio.

Benedict XVI: Was He A Real Pope?