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Paul had a heart for the Jewish people. In fact, Paul loved the Jewish people so much and yearned for their salvation to such an overwhelming degree that he actually said:
Romans 9:3-5 For I could wish that I myself were accursed, separated from Christ for the sake of my brethren, my kinsmen according to the flesh, 4 who are Israelites, to whom belongs the adoption as sons and the glory and the covenants and the giving of the Law and the temple service and the promises, 5 whose are the fathers, and from whom is the Christ according to the flesh, who is over all, God blessed forever. Amen.
Paul was saying, "if it was possible - which it was not because salvation is about God's effectual call on an individual's life - to be cut off and save his kindred, he would have done it.
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They want to know God. They have a great zeal for God. Yet they have rejected the Messiah. They have rejected the clear teachings of the Hebrew Scriptures leading up to and pointing to the Messiah Yeshua coming and dying for the sins of the world.
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Oh how we need believers sold out to the gospel of Jesus Christ as well as those committed to taking the gospel to the nation that God chose to make a covenant with that will never fail (Gen 12, 15, 17).
To God be the glory.