This is important for people to undersand Patrick, and is actually the Jewish understanding of what it means to convert. It is not a rejection of one thing and an adoption of something completely different, but a reordering of the inner man to his true calling. Paul writes of his own “Conversion” to the Galatians:
For you have heard of my former life in Judaism, how I persecuted the church of God violently and tried to destroy it; and I advanced in Judaism beyond many of my own age among my people, so extremely zealous was I for the traditions of my fathers. But when he who had set me apart before I was born, and had called me through his grace, was pleased to reveal his Son to me, in order that I might preach him among the Gentiles, I did not confer with flesh and blood…, (Galatians 1:13-16)
Paul’s focus was narrow - his tribe and nation - but his intentions were pure. He loved God and the religion God had esablished, Judaism, and truly thought the Christians were a corruption of God’s religion. Paul describes his conversion as a cooperation with grace, and a reordering of his actions to what God had created him to be “Before I was born”, after which his focus was much wider - preahching to the Gentiles of the whole world.
Paul still offered gifts at the temple and took a Nazarite vow after his conversion. Paul prayed all the Jewish prayers that a faithful Jew would pray and continued to go to the “Place of prayer” as a Jew would.
People don’t realize that Christianity worshipped side by side with Judaism unil the temple was destroyed in 70 AD, at which point rabinnic judaism and Christianity began to seperate. But Christian believers in Jesus would have still be faithful Jews at least until that time. Even then it wasn’t a one time split that we can point to, but more of the beginning of a process of seperation.
-Tim-