Simple fact -- human society cannot function productively without religion. We need moral laws to guide our inter-personal behaviors. When religion fails or is rejected, chaos rises. We've seen this in the modern West. If Western people refuse to voluntarily embrace Christianity and make it their guide to social behaviors, they will find Islam imposed upon them by force. It's just the way human societies work. Without religion, they become corrupted and fall apart. We have a religious vacuum in Western nations now. It is encouraging the rise of Islam.