“And I am sure all IRA crimes of murder, torture (kneecapping and such), raping, robbery etc are all being victoriously pursued as well.”
They are - in that there have always been investigations.
That doesn’t mean there is evidence enough to win convictions or even to charge anyone: http://www.theguardian.com/politics/2015/sep/29/gerry-adams-will-not-face-trial-over-jean-mcconville
This event was different. Fourteen civilians - unarmed civilians - were shot dead in broad daylight in front of dozens of witnesses. There was no real criminal investigation for almost 40 years. The British army or government lied about what happened and even faked evidence to cover up the crime.
https://www.youtube.com/watch?v=KCsIg8l7Xa8
Wasn’t there some sort of reconciliation thing, moving on. . that sort of thing?
Innocents died from the terror bombings as well. . .both sides did some nasty things.