Depending on when they arrived your ancestors may have faced the same cultural discrimination that others face now. Early on, hard labor was about the only thing Irish immigrants were given. They eventually earned their place and were normalized in society. Just as others have done and do.
Thing is, Hispanics coming to this country continue along mostly the same path, after numerous generations and over 100 years. They still pick fruit, dig ditches, hard labor stuff. But they come here to do it, because even though it's hard and risky, it's still better than where they were. I imagine part of that is the lack of skills and many are still illiterate in their own tongue.
But their children speak English, they are educated and they will take their place as functioning members of society.
And when they vote, they most definitely do not all vote Democrat. They bring with them a strong christian heritage and often do not care for LGBT and abortion issues. They vote against them. In CA, they once voted in some numbers for anti-immigration legislation.
Speaking of voting. I have been doing so for some 45 years. I had to show ID in SC, GA, and for 21 years in CA and now again in GA. They had my name and address on a sheet at the polling place and I had to show ID to match that.
The Irish/Welsh half of my family tree were Kansas farmers in the 1800's. My father was first generation born here with Austrian roots.