«I have spoken openly to the world,” Jesus replied. “I always taught in synagogues or at the temple, where all the Jews come together. I said nothing in secret».
The Messiah did not form «Churches». He focused on people, and his message was that Jew and Gentiles should connect to their Father in Heaven. To convince his own people, he taught in Synagogues. In public he rebuked people who had misunderstood.