The Serbian, Croat, Bosnian and the nation were originally religious communities that evolved into nations. It might not be something widespread, but is does exist and it is well documented. This phenomenon takes place when the members of a religious community become more and more secular, sometimes atheists, but they identify with their religious community. Why identifying with a religious community when one lose faith? Because a religious community cannot ne defined only through its spiritual content. A religious community is also a historic community with its own history, its traditions, its own historic characters, its philosophy, its mythology, its moments of glory, or sorrow...This is why the Serbians and the Croats who are culturally pretty similar, form two distinct nations; they just don't identify with each others narrative. The same is true for the Jewish people. Shlomo Sand may dislike that, but even Ernest Gellner, his heroe, said that a Bosnian is a Muslim Serbo-Croat who lost faith!
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