Ireland/Ulster is a wonderful example of what can happen when there is sufficient good will and enough pain and disgust over the past. There is a parallel between Ulster and the US to a degree. In both cases, what may have started out as legitimate protests over real grievances got coopted by essentially criminals who used and are using the veneer of protest to both exacerbate and profit from them to increase their power and wealth. In Ireland, when enough people saw that the IRA had become a criminal organization, dealing in extortion, selling drugs and so forth with no real concern for people, change became possible.
I do not see that awareness in America today, and a low-grade civil war and fracturing of the country is almost inevitable. A poll quoted by CNN reported that a growing percentage of moderate Americans are willing to tell the redneck states to leave. Impossible? An American seer Edgar Cayce predicted racial violence in the US but that the breaking of America would come from class warfare, and I interpret that to mean the wealthy against the poor and that gap has been growing for some 60 years. A political economist about ten years ago stated that so long as the "Communist" in Russia alternative existed to Capitalism, the rich and powerful were careful to not grind the working and middle classes. Once the USSR collapsed along with its pretend socialist government, the field was seen as clear for the 3% to begin to erode the other 97% of their incomes and political power, and that has been growing since 1989.