There was also the Irish mob,
Yes, I know about them. One of the problems talking about 'the Irish' with Americans is that they think Irish American is the same thing which it really isn't.
I still have have relatives in Waterford and Dublin. I know all about the Irish temper..lol
Sorry to be rude about your family but they must be a rough lot - skangers, as we'd call them in Dublin. How many times have you been to Ireland and how many times have you met these relatives? What part of Dublin are they from? Whereabouts in Waterford?
Anyway, all I can say is that I've been in and out of pubs all over Ireland since I was a teenager, and I've never witnessed a bar fight. Not saying it never happens but it's definitely not a thing in Ireland.