Ireland didn't do anything remotely like what Hamas is doing to Israel. If it did, you would have seen the relevant bits of Ireland flattened like what England helped do to Nazi Germany.
I don't really have a side in this argument. But I do feel compelled to mention that England absolutely did terrible, terrible things in trying to quell the Irish problem. Oliver Cromwell famously said that Catholics were welcome to go to 'Hell or Connaught' as he drove them from the Pale. (Those of you who can see beyond the postcard photos will know that Connaught is close enough to Hell when you're trying to work a farm.)
The potato 'famine' was a direct result of predatory practices put in place by the British and Anglo-Irish to keep the Irish poor and desperate. Over a million people died. But this practice had been going on for years and years beforehand. Deacon Smith's A Modest Proposal , considered one of the greatest examples of satire in the English language, was a direct response to the appalling depredations of the landlord class in Ireland.
In fact the intransigence of the problem of Northern Ireland is a direct result of the British relocating large numbers of people (mostly Scots) to Ulster in order to create a 'buffer' population. Now, 400 years on, they have a very similar problem to that experienced by the Israelis, who tragically are using almost exactly the same tactics to deal with it, proving that they've failed to learn a thing from the fight for Irish independence.