“What we find, therefore, is that the inclusion of Gentiles into God’s people becomes the leading edge of a broader principle: the removal of all outward distinctions in the face of God’s grace and the universal offer of the gospel. The implications for the church are far-reaching. The church is called to be a genuinely “countercultural” institution, in which the usual barriers to association—race, national background, economic status, etc.—have no relevance at all.
Yet while the church broadly defined may look like this, individual churches rarely do. For what appear to be good reasons, our churches tend to be monochromatic: suburban, middle-and upper-class white, inner city black, Hispanic, Korean, etc. One understands the natural tendency to feel comfortable worshiping with people who are like us. But one of the purposes of the church is to force us out of our comfort zones so that we can benefit from association with people who are like us in their faith in Christ but different from us in every other way. By breaking down the barrier separating Jew and Gentile, Christ shows that he wants to build a real “rainbow coalition” among his people. Unfortunately, we can stifle that intention by insisting on building local churches that target only one kind of person.”
Moo, D. J. (2000). Romans (p. 155). Grand Rapids, MI: Zondervan Publishing House.