Is this some kind of joke?
No, it’s hard to argue their cause was unjust unless your a British imperialist. The tactics they deployed on the other hand were at times undeniably morally abhorrent.
Uh, it absolutely is not hard. A majority of Northern Irish residents support remaining in the UK and oppose being uniting with Ireland. Respecting popular sovereignty = opposing the IRA.
There hasn’t been an actual referendum here unfortunately so we can’t really say for sure, but it’s a lot tighter than it was a few years ago.