Jesus of Nazareth is the Son, the second divine person mentioned when we pray, “In the name of the Father and of the Son and of the Holy Spirit” (Mt 28:19)
Jesus was either an imposter who made himself Lord of the SABBATH and allowed himself to be addressed with the divine title “Lord”—or else he was really God. The scandal came when he forgave sins. In the eyes of his contemporaries, that was a crime deserving death. Through signs and miracles, but especially through the Resurrection, his disciples recognized who Jesus is and worshipped him as Lord. That is the faith of the CHURCH.
