Following the war and in response to lingering anti-Semitic attitudes, efforts were made to establish separate Jewish Christian congregations. . . . In the 1960s, a new generation began to make its presence felt. Impacted by the anti-Establishmentarian views of those years, they had little allegiance to the church and a strong desire to distinguish themselves. They began to call for the adoption of Jewish traditions and a more aggressive assertion of Jewish identity. The American branch evolved from what was originally known as "Hebrew Christianity" into today's "Messianic Jewish Movement." . . .
The old guard were largely fundamentalistic Christians of Jewish origin who were conscious of their Jewishness, avidly supported the Zionist Movement, active in their opposition to anti-Semitism, and eager to promote the gospel among their people. But most saw no room for what is now the Messianic Movement. 
1. Baruch Maoz, Come, Let Us Reason Together: The Unity of Jews and Gentiles in the Church (P&R Publishing, 2012), p. 204.
2. ibid, emphasis added.