Impressive and chilling. You should read Prophet Song by Paul Muldoon, won the Booker prize in 2019(?). In it he skilfully creates a mounting sense of dread and isolation as the country, Ireland, descends into civil war on the lines of Syria. After the takeover by a nationalist populist party ~ voted in narrowly ~ a similar dynamic to your tale unfolds with party badges worn on labels, teachers and trade union leaders detained, demonstrating crowds attacked by paramilitary forces, a slow but armed response from the opposition which ends up in total war. It's horrifying and far too plausible for comfort. 'Surely Europe or America will intervene?' The leading character cries,but no, nobody comes to the rescue and like Syria a massive refugee exodus occurs ironically through the north of Ireland with rubber dinghies carrying those fleeing the war across the channel between Ireland and Scotland ~ a much more deadly stretch of water than the English channel. If you like dystopia as you clearly do, read Prophet Song.