If I recall correctly, and that's a shaky if, then the support base the IRA held with the irish-american demographic was the by far most important in terms of finances and armaments supplies. Whatever Gaddafi, ETA and the eastern bloc supplied was overshadowed by the smuggled goods coming in from overseas, and the IRA could have continued the conflict on that base alone.
That's what makes the Troubles one of the most interesting conflicts of the Cold War to me. A terrorist organization with a strongly leftist political ideology that fights against America's most powerful and important european ally, all the while being supported by american citizens, who had a political reality build on anti-communism and anti-leftism. And this went on for 30 years!
Another thing that I thought about a few days back was how a renewed conflict would potentially be fought... Because if what Roger says is true and the Loyalists have vastly more manpower, arms and better organization than the republicans, or whatever remnants are still active, then what can they realistically do? Taking the conflict to Britain itself and resorting to bombings doesn't seem to unlikely, depending on what loyalists will do in NI itself. They've proven themselves capable of massive attacks in major, A-Tier cities, and loyalists and republicans will have been very busy rebuilding their arsenals since pre-brexit...
Will there be targeted killing of media personnel? Control over the narrative of the conflict held by the British state during the Troubles was a major plus for the domestic and international PR for the government back then, maybe the republicans will try to pry this weapon away from them.
@RogerRanger @Nilgiri