Read the acts of the Apostles which states about just a few of the occasions after Pentecost that sermons were given and how many Jews accepted Baptism. In one cast 5000 men and their families, in another I think about 8000 Men which means their families also. There were only about 40,000 Jews living in Jerusalem at the time of Christ. This was only two occasions not all the occasions of Baptism in the Holy land. It was always the majority who accepted Christ. The only majority that didn't convert were the Jewish priests who never wanted a Messiah and that is shown clearly in the story of the three wise men. They convinced King Herod to fear the new born and were in that way instrumental in the killing of the innocents by Herod's order.