The comparison is problematic. Palestinian Israeli citizens can practice their religion openly, and without penalty; legal penalty; they can own land, own businesses, benefit from the same publicly-funded services as Jewish; they speak their own language if they care to, they can advocate for the policies they favor, they can vote, form political parties, and hold elective or appointed offices.
It was quite otherwise for the Irish.
I think this love feast between the Irish and the Palestinians began with their own little Gerry Adams who was supplied guns by their terrorist organizations back in the 1970s.
But the Palestinians are not ruled by their own people in their own country. The desire to be ruled (if you must be ruled) by your own people and to have your own land seems a perfectly reasonable desire. It is true that the political analogy is not perfect, but the emotional one (and emotions drive as much of politics as logic) seems fair.