I saw a "no Irish need apply" sign hanging behind the bar at an Irish restaurant once among the usual bar-room curios.
Every immigrant group goes through a "rite of passage" of discrimination when they first start coming to America. The Irish were one of the first groups so that sign is probably from the mid-19th century, a genuine antique. A generation or two later, Irish became so respected for their sense of decency that they were overrepresented in police forces. It became a cliche for American cops to speak with Irish accents.
The same thing happened with the Italians up through the era of Al Capone and the Mafia and now, like the Irish, they have been thoroughly assimilated. I suspect you could not find an American of third-generation Irish or Italian ancestry who still identifies himself as a hyphenated-American and whose blood is not as thoroughly blended in the Melting Pot as the rest of ours. Americans no longer even realize that names like "Malloy" are of Irish origin. Only names starting with O'.
Look at the Asian immigrants. They got the worst treatment of anybody (of those who came here voluntarily or were not here first, anyway). There were laws against giving them citizenship and at one point Japanese-Americans were regarded as disloyal by virtue of their race and put in camps. Nowadays Asian-Americans are regarded as the quintessential American scholars and entrepreneurs that everyone wants their children to emulate.
If there's any rancor toward the Irish, it's over the IRA thing. We have nothing against good honest armed revolt, may the best man win and all that, but we absolutely despise terrorists. But we have duly noticed that the IRA leaders are shrewd enough to realize that this is not the right era to choose terrorism as a tactic. And boy howdy do we ever respect that!
No, I would say that we Americans love the Irish almost as much as we love the English. Not that we've got anything against the Scots or the Welsh, we just don't know much about them.
St Patrick's day in celebrated by everybody (although it's mutated into more of a 'drinking holiday' as opposed to a religious one).
All of our holidays have become secularized. It's said that in America the two most recognizable icons of Christianity are Santa Claus and the Easter Bunny.
We celebrate St. Paddy's Day the same way we celebrate
Cinco de Mayo. (The Fifth of May, a rather obscure Mexican holiday that is more celebrated here than Mexico's actual independence day, September 16.) By drinking beer from the country in question. In fact a beer commercial is running on TV right now, showing an Irishman slowly walking down a long country lane, explaining how Irishmen love to celebrate "this day." He walks into a pub, it's all decorated in Mexican themes, the publican is wearing a
sombrero, and serving Mexican beer.
There are also a lot of Irish customs and traditions which have seamlessly merged into the American culture.
"Celtic" music is all the rage these days. People have even begun pronouncing the C as a K, which I guess is how it's done in Gaelic.
Sexy accents? Do you really think so?
We Americans just love to listen to people speaking our language with a foreign accent, something I don't think we share with the British. Sometimes we find it humorous, sometimes charming, but we love it. Irish, Russian, German, Swedish, Spanish, Italian, French, Farsi, Arabic, Chinese, Japanese... there are entertainers who build their entire careers on learning to speak with an exaggerated foreign accent. Even British and Aussie accents. Even a Canadian accent, and that's not easy to discern.
Erin go bragh.