Guy isn't even Irish! He's American of Swedish and Irish descent. He's like one of those wonderbread wops who had a grandfather come off the boat over a hundred years ago and thinks it makes him Italian.
Joe Rogan and Steve Schirripa had a good conversation about stuff like this on their podcast.
And look at them, despite his surname Rogan is actually more Italian than Schirripa. Rogan's 75% Italian and 25% Irish, Schirripa's half Italian and half Jewish.