Maybe.
Or it could be that justice was suppressed for a long, long time and only now it is being faced. If it is true, as the article says, that the army opened fire without warning or provocation, and that some that were shot were fleeing.....you can sort of see why they were pretty ashamed.
“If it is true, as the article says, that the army opened fire without warning or provocation, and that some that were shot were fleeing”
Hardly. It was a time when in the preceding 3 or 4 months, something like 30 British soldiers had been killed in sniping and bombing attacks. Areas of Derry were in revolt complete with barricades. Grenades and IRA murder was rampant. In the middle of that, they took one of their marches towards a nearby community and the Paras were sent to prevent that.
Some of the radicals stormed the para blocking position and the fight ensues.
Without provocation is a bit of a stretch. This was like the Fergusun crowd only much more dangerous and violent.
A Soviet propaganda campaign against British aggression in Ireland suddenly emerged led by the Prague based International Union of Students, and assorted World Federation groups.
The Troubles was a concept used to mask the terrorist activity whose intent was to destabilize a mostly peaceful society. Much like the CAIR backed Black Lives Matter and other Islamic connected terrorists are doing in the U.S. currently.