My dear nameless friend, pl read the book "A Thousand Splendid suns" by Mr. Khaled Hosseini (this is on the unrest in Afghanistan) to understand what would happen if people blindly follow religion.
Even if the population of entire world becomes Muslims, there would still be fights. At the best of times, there were tussels between Sindhis and Punjabis in Pakistan. We all can see the problems in India based on religion, caste, region, language, etc! That is human nature. Organized religion is organized madness. So the sooner we all get rid of the religious dogmas, the better for the whole world.