You know, for such a friendly lot of people, we do seem to have a remarkable knack of conjuring a fight out of anything.
But as for the stereotype about the Irish being hot-tempered...makes me blood boil. But in fact I don't think it's not a good generalisation.
Indeed, there are lots of people prone to losing their temper in any set of humans from any planet I've come across; but there's a difference between being prone to losing your temper (which I've never found particularly characteristic of Irish people I've known), and quite enjoying a battle (which perhaps I have). Losing your temper gets in the way if you want to win most times.
But, as Percy French sapiently pointed out: "When we've got all we want, we're as quiet as can be".