There's an awful lot of green tinted wishful thinking going on here. If the IRA could cause such chaos and remain undefeated (just about) for 30 years how do you think the unionists will react if forced into a shot-gun marriage? I doubt they'll say "Oh so Martin wants a United Ireland, let's just give him one, nice and quietly and peacefully. We've opposed it since 1609 but Sinn Fein has now convinced us, sorry about the slight delay".If it happens it MUST be by agreement. Besides, the Border is just a state of mind: I crossed it recently and only realised that I was out of Britain and into Ireland when I saw the potholes on the road.
PS Good luck to the first new recruits to the PSNI announced today. They'll need it. I see Sinn Fein are still not happy. Once the police were too Protestant, now they are too middle class!