What does Catholic Apologetic mean? When Saint Justin Martyr wrote "The Apology of Justin Martyr", he is giving his defence of the Catholic faith on a certain topic in the form of a talk or speech. He wasn't apologising for being Catholic.
Christian worship described a mere 60 years after the last gospel was completed. "As early as the second century we have the witness of St. Justin Martyr for the basic lines of the order of the Eucharistic celebration. They have stayed the same until our own day for all the great liturgical families." - CCC 1345
(Saint) Justin Martyr charged that the Jews crucified Christ in the highest pitch of their wickedness. It was during this time (150 A.D.) that the first encounter with Replacement Theology was embraced where the church replaced the Jews as God's chosen people. The seeds of Jew hatred were planted, and two millenia of antisemitism would follow.