Some of the specific forms of discrimination that Irish immigrants faced included:
* Physical violence: Irish immigrants were often the target of violence, both from individual thugs and from organized groups like the Know-Nothings. In some cases, Irish immigrants were even lynched.
* Job discrimination: Irish immigrants were often denied jobs, or were paid lower wages than other immigrant groups. They were particularly discriminated against in skilled trades and other desirable jobs.
* Housing discrimination: Irish immigrants were often forced to live in slums, and were charged higher rents than other immigrant groups. They were also often denied access to public housing.
* Political discrimination: Irish immigrants were often denied the right to vote, or were gerrymandered out of political districts. They were also often excluded from public office.
* Social discrimination: Irish immigrants were often excluded from social clubs and organizations, and were often the targets of jokes and slurs.
These are just some of the forms of discrimination that Irish immigrants faced in America in the 19th century. It was a difficult and challenging time for Irish immigrants, but they eventually overcame much of the discrimination they faced and went on to make significant contributions to American society.