There is more to that than meets the eye; both peoples viewed Balfour as the source of their woes. His declaration regarding Palestine in 1917 followed on the heels of the Easter Rebellion the year before. Outside of that (both being peoples occupied by English imperialists), the two have nothing in common whatsoever.
Thanks for your opinion.
Reality, however, is not based on communist propaganda. Just like the USSR sided with the Islamic national socialists against the “bourgeois” West, so did the IRA.