no christian culture

Andrew Walls in The Expansion of Christianity:

One must conclude, I think, that there is a certain vulnerability, a fragility, at the heart of Christianity. You might say that this is the vulnerability of the cross. Perhaps the chief theological point is that nobody owns the Christian faith. That is, there is no "Christian civilization" or "Christian culture" in the way that there is an "Islamic culture," which you can recognize from Pakistan to Tunisia to Morocco. ... [C]ultural diversity was built into the Christian faith with that first great decision by the Council in Jerusalem, recorded in Acts 15, which declared that the new gentile Christians didn’t have to enter Jewish religious culture. ... [C]onverts had to work out, under the guidance of the Holy Spilt, a Hellenistic way of being Christian.