This chapter is part of a book that explores the theology, anthropology and sociology of so-called Insider Movements (IM). In this chapter the author gives an account of his field research in Asia Minor among Muslim-background believers (MBBs). The chapter also explores the original context of Christians in Antakya (Antioch) in the first century, arguing that in calling themselves ‘Christians’ they were intentionally *not* trying to remain within their socio-religious communities, but—like the Christians of Asia Minor today—were trying to forge a new socio-religious identity altogether.