Geographic sorting between fractured and non-fractured is dangerous. One group of people believes there is still a nation-state.
The urban-rural divide in political and nationalistic lines is clear in many countries. In countries with strong religious/conservative urban/modern populations like the US[1], Iran, Turkey it can become very problematic. Iran is probably closest to the civil war due to this fractionalization.
[1] https://www.niskanencenter.org/wp-content/uploads/2019/09/Wi...