Well again based on your previous posts I don't think you're well placed. As I say no offence meant but I think you're likely too entrenched to be objective.
I have had many members of my family involved in the troubles. Those who organised the first civil rights marches and acted in negotiations for example.
I struggle to see how the troubles was anything but a civil war. What would the UVF, UDA be rebelling against exactly.
Also according to wiki and many other sources the IRA were belligerents.
A Civil War implies that the sides involved are of equal strength. Like the Russian Civil War, which like the Troubles was also a 3-way conflict between The Bolsheviks (authoritarian socialists) , the Whites & the various Left-Wing Libertarian Socialist groups.
Remember the UVF, UDA, Orange Volunteers, Down Orange Welfare & Vanguard rebelled against the Suninngdale agreement in 1974 & it's height bombed Dublin & Monaghan killing 34 civilians & injured 300 others, and just 2 weeks before the Dublin bombs the UVF bombed a Nationalist pub in Belfast killing 6 civilians & injuring 30.
In total 49 Catholics were killed in the month of May 1974, making it the most deadly month of the conflict for civilians.