Unfortunately, paratroopers ex or not were and are targeted in Northern Ireland. Murky circumstances, state collusion and losing relatives with no answers tends to breed bitterness.
I don't know his wife's back ground. If she was from East Belfast and moved back there, no problem, he could visit and he'd have pints waiting for him at the bar. Paratroop Regiment flag flown often in Loyalist areas.
West Belfast, Bogside and other heavily Nationalist areas, they'd know her ex had been a paratropper and shoot him on the wayvtonpuck up.of drop off his son. Someone would notice in those streets. Even to this day he'd be at risk
Somewhere inbetween, rural, small towns, mixed areas, he'd probably be okay. But evebn there, again, the wrong person could notice
Unfortunately the sad reality of Northern Ireland.