Making the distinction between Our Culture, Their Culture, and God's Culture wasn't easy for protestant missionaries for who took advantage of the nations' zeal to colonize distant lands in the 19th Century (the Great Century of missions). As a result, The Great Commission came back into focus and Christ was preached around the globe, but in a mixed message that challenged natives to extract the Truth of the gospel from the cultural baggage of Europe.
Whether we are called to share the gospel overseas, or to our neighbors across the street, we must relearn what the early Church realized at the Jerusalem Council (Acts 15), that Jesus Christ is the God of all cultures. If we expect the seeds of the gospel (Matt. 13) to look identical in every culture then, we'll repeat the past's mistakes by demanding a flower pot and hinder the gospel from rooting in each culture's native soil. This contextualization (1Cor 9:19-23) requires removing what blinds us to our native culture so we can best share Christ even if it impacts our ideas of what church and worship should look like. If we insist on patriotism or our personal traditions, then we too will elevate Our Culture over Their Culture calling it God's Culture.