Populists argue that Islamic immigrants are fundamentally different from Europeans. As evidence, they point to notions of religious and cultural identity. Such arguments have popular resonance. As more mainstream politicians pick up on these themes, they begin to take on an air of common sense. Nevertheless, they are mistaken. Europe has a long track record of reconciling competing identities. This has happened by focusing on patterns of interaction (solidarity) rather than obvious indicators of distinctiveness. Using the examples of the Netherlands and Turkey, this article illustrates the wide spectrum of European approaches to the challenge of getting different groups to share the same geographic space.