He persecuted Christians.
He chained them, took their possessions and his attention put fear in their hearts.
In the name of his Middle Eastern religion, he and a group of his comrades entered Syria with the express purpose of quashing the Christian faith there.
It seems that a lot of his antipathy to the Christian faith was fueled by his exposure to Christianity as he persecuted it.
He heard testimony of a risen from the dead Savior.
He saw love and self sacrifice in the name of that Jesus.
A refusal to bend or cave to his will, but a devotion to the will of Jesus.
One day he came to the realization that the people he was torturing and killing were right.
And he converted.
And the people who had lost friends and relatives to his attacks ended up accepting him and loving him.
The power of God working in men.
Saul became Paul.
He wrote most of the New Testament.
Even if he stayed in that other political camp (a democrat)?