Sort of like apartheid, but where both sides think the other isn't fit to breathe the same air

I WAS REFLECTING ON IRELAND DURING THE TROUBLES, AND A THOUGHT OCCURRED...SEPARATING 2 BELLIGERENTLY IRRECONCILABLE PARTIES ISN'T THE WORST IDEA; IF GUN VIOLENCE WAS DECRIMINALIZED, WE'D QUICKLY END UP WITH A PATHWORK QUILT OF TERRITORIES WHERE NO ONE WAS UNWELCOME. ADD DEMILITARIZED ZONES BETWEEN TERRITORIES AND VIOLA--AN AMERICA ALL THE SURVIVORS CAN ENJOY!