No, NICRA was NOT due to any "hundreds of years of colonial oppression by the British" at all. It was simply not a factor in any of NICRAs material whatsoever.
The then Unionist Government, yes, where there was some discrimination up to a point. But not to the extent as claimed by Republicans.
And I say that as a Catholic from Northern Ireland myself.
The history of what happened with NICRA is more complicated than you make out here and it's accurate to say IRA did infiltrate NICRA. Their aim was to provoke constant confrontation with the RUC which wasn't what members of NICRA were after.
So much so that John Hume refused to attend the controversial march in 1968 and he also testified to the Saville Enquiry he tried to stop the march in 1972 that is known as Bloody Sunday.
Hume was the leader of the biggest Nationalist Party throughout the Troubles.
Hume absolutely knew that militant Republicans in the Official IRA and also People's Democracy were out to instigate violence.
I'd recommend you read "The IRA And Armed Struggle" by Rogelio Alonso if you can get a copy. Excellent, excellent book which talks about this little known aspect of PIRAs strategy amongst other things.
The Irish Peace Process website I linked? He's a lifelong repentant former member of PIRA who's been trying to make amends by helping correct the historical record. Very good source of information considering he was there for it personally.
Paisley was a firebrand who whipped up idiots up who went on to commit various crimes. And then distanced himself from them.
I'd recommend Professor Liam Kennedy's "Who Was Responsible For The Troubles?" book. Excellent academic work.
Back to my point which you've ignored....Danny The Red was involved in sparking the Troubles as explained in the Irish Peace Process website. It's extensive work.
So, my point is that people should not be so quick to urge British people to do as the French have done this year. The last time this was urged it did help spark the Troubles. Its one of the lesser known aspects of the Troubles.