Irish person born in Dublin. In Ireland being Irish is a nationality. In American they call themselves Irish as an ethnicity. Outside of America Irish ethnicity is not a thing. In Ireland, the American tourists who call themselves Irish as an ethnicity are known as plastic paddys and are very much a source of amusement.
In Ireland from the 1950's onwards, as the country started to recover from 800 years of British occupation and WW2, Americans were targeted as a way to bring money into the country. There was an Irish Government department originally named An Bord Fáilte created by the Tourist Traffic Act 1952. It is now known as Irish Tourism. Their job since the 1960's is to basically reinforce the yew olde Darby O'Gill stereotype in the minds of Americans so that they come to Ireland and spend money. Huge amounts of money is spent, most recently their biggest project has been The Wild Atlantic Way.
There is a huge economy in Ireland built around American tourists, so the Irish people smile, take the money while making fun of the Americans in private. We even have our own theme park in Dublin, called Temple Bar, where we corral all the tourists, and get them to spend huge amounts of money in the pubs. Its well known that the pubs inflate the prices for the tourists.