The mother church in Jerusalem was made up of Jewish people. The book of Hebrews was addressed to Jewish believers. Throughout the post New Testament era, there has been a small but steady stream of Jewish people who have come to the Lord. Neander, the father of church history was a Jewish believer. A second observation, is that not all gentiles have accepted Jesus.
True believers are indeed a minority in the world, even in our own cities.
The best we can say, is that some Jews, and some Gentiles have accepted Yeshua, but most people, both Jews and Gentiles have not accepted him. There are two categories of reasons why Jewish people reject the Gospel. The first are theological reasons. Jewish people have a hard time accepting the idea of God existing in human form. This objection is based on the notion that we believe that Yeshua was a man who became God.