Paul had Zeal for God in his unconverted state Phil 3:5-7
5 circumcised the eighth day, of the stock of Israel, of the tribe of Benjamin, an Hebrew of the Hebrews; as touching the law, a Pharisee; 6 concerning zeal, persecuting the church; touching the righteousness which is in the law, blameless. 7 But what things were gain to me, those I counted loss for Christ.
He probably had more zeal for God in his mind than the jews in Rom 10,
Yet he said at that time when he looks back he was lost and in unbelief 1 Tim 1
12 And I thank Christ Jesus our Lord, who hath enabled me, for that he counted me faithful, putting me into the ministry; 13
who was before a blasphemer, and a persecutor, and injurious: but I obtained mercy, because I did it ignorantly in unbelief.
14 And the grace of our Lord was exceeding abundant with faith and love which is in Christ Jesus.
15 ;This is a faithful saying, and worthy of all acceptation, that Christ Jesus came into the world to save sinners; of whom I am chief.
See you cant be worshipping the True God in unbelief. Sure he had zeal for God in his darkened lost mine, but it was in ignorance of the true God.
But thank God the irresistible grace of God exceeding abundant to him bringing faith and love to him. That Grace gave him faith in the place of unbelief, and love to Christ and His people in the place of hate towards them,