Mrs Marilyn Hunter
Did Paul ever care much for the Jews religion?

Yes.

As Saul, he was very zealous for his religion.

"And Saul was there, giving approval to his [Stephen's] death.

On that day a great persecution broke out against the church at Jerusalem, and all except the apostles were scattered throughout Judea and Samaria. Godly men buried Stephen and mourned deeply for him. But Saul began to destroy the church. Going from house to house, he dragged off men and women and put them in prison."

He thought he was doing what God wanted by destroying followers of Jesus.

Later, as Paul the Apostle, he was just as zealous, if not more so, for the Christian religion.

The only circumstance where you might say he didn't care for the Jews religion was when, as Paul the Christian Apostle, he disapproved of the Jews who refused to see Jesus as the Promised One, the Savior of all mankind.

Before he met Jesus on the road to Damascus, Saul (Paul) considered himself to be the best Jew and was heavily into persecution of Christians. After meeting Christ he became completely changed and preached the Gospel (the Good News of Christ's salvation) for the rest of his life. He himself was persecuted greatly for this. However he considered everything in his life to be rubbish compared to the gain of Jesus Christ.