For Luke, like Matthew (Matthew 5:17-20), Jesus not only is not contrary to Judaism, He fulfills it: as the “glory of Israel” (Luke 2:32), Jesus is Torah in Person (Luke 2:32 in allusion to Isaiah 2:3, 5). For John also, Jesus is the King of Israel (John 1:49-50). Judaism is the core of Christianity.
Indeed Judaism is the core of Christianity. This Judaism is our mother and everything we have in our Church is Jewish. Jesus Christ is a Jew. The Blessed Mother was a Jew. St. Yosef ben David was a Jew. All of the Apostles were Jews even St. Paul. Our sacraments particularly the Holy Eucharist is Jewish. It is the integral celebration of Jewish Passover. Thus, we are really Jewish!