Ok, so the racism is mostly a joke, but you said:

do Americans really hate Irish?

This is important because it implies that Americans and the Irish are two separate people. Which they were.

So who were the Americans?

The original white Americans who founded the first important American colonies were almost all protestants seeking to establish religious colonies and/or flee religious persecution in Europe.

For example the Puritans founded many colonies in New England, and were famous for hating fun and other forms of witchcraft.

Presbyterians, who were Scotch-Irish (different than the "Irish" we are talking about) settled many of the middle colonies and drove inland.

My hometown of Philadelphia and State of Pennsylvania was founded by Quakers (best religion, I was raised Quaker) from England.

And then you have a bunch of Germanic Anabaptists who went to the country to farm and mostly just wanted to be left alone. These were the most successful Americans, as they are still in the country, farming, and actually have been left alone. They are now the various Amish and Mennonite sects that populate much of rural Pennsylvania, Maryland, and Ohio, and they still speak the original German their ancestors spoke. Oddly enough, they still refer to all Americans who are not them as "English".

So where do the Irish fit in? They all came to America after all the previous groups had been here for many, many generations.

And they didn't come here because of religious ideology, they came here because their potatoes got sick.

They were mostly poor, rural catholics in Ireland who suddenly flooded into American cities and wanted jobs and liquor. A lot of them did not speak English.

The original Americans did not like this massive wave of poor, poorly educated Irish who did not share their values or language.

There was such a thing as "NINA" jobs (No Irish Need Apply) and a general feeling of "why are you ruining this country we just built?"

Regardless, there hasn't been any "serious" racism against the Irish since the 50s.

The Irish, at least in Philadelphia, are all working class catholic union guys. They share a lot of stereotypes with the Italians here.

The stereotypes are: Drunk, hardworking, possibly drug using, violent, racist, tight family.

Good people overall.

I am sorry if writing this has only confused you more.

Regards,

-Theo

It is mostly a joke, very complicated though. A lot of cultural subtext behind it.

I am currently in a very chaotic moment of travel, transferring trains 'n' shiiiet. Once I have boarded the train to Atlantic city I will explain some of it to you, just respond to this comment.

https://pic8.co/sh/HAMjk1.jpg